- Post is under moderation/ #Audi RS4 B5 with a 5-cylinder engine / Words Davy Lewis / Photography Andreas S Jansson and Bjorn Eirik Odegård
This track-prepared RS4 is running a #5-cylinder-engine that makes 939hp – now there’s something a bit different…
RS4 B5 940hp 5-cylinder swap
Doing things differently is a risky business. Get it right and you’ll win the respect and admiration of your peers. Get it wrong however, and people will tear you apart on social media. This couldn’t be more relevant than in the car scene. From choice of wheels, to the tricky subject of rear wings – an upgrade that wins the internet with its ingenuity and originality is only a hairs breadth away from a total balls-up that incites derision and hate. People are funny, eh?
So where am I going with this? Well, one of the most fiercely loyal of all Audi enthusiasts are the RS4 B5 guys. Many view this as the only true RS4. The real deal. The big kahuna. The daddy. And you know what – I’m inclined to agree. There’s something about that wide arched, 2.7 biturbo-powered avant that is bang on the money. Never mind the fact that most of them will spend an inordinate amount of time in the garage, simultaneously emptying your wallet and making you cry into your Aldi value beans (cos that’s all you’ll be able to afford as a B5 owner). But, they’re a passionate, dedicated bunch and I applaud that.
So what on God’s earth are they going to make of an RS4 with a naughty secret under its bonnet? You see, this track-focussed RS4 has a cylinder missing. Or, to put it more clearly – it has one less cylinder than it should. But why would anyone remove a perfectly good V6 biturbo and replace it with an old five-pot?
Well, for starters the V6 wasn’t perfectly good. The owner had been through numerous turbos and frankly he was sick to the back teeth of removing the damn thing to fix it. The B5’s engine may be a masterpiece when working well, but get a recalcitrant unit that has frequent issues, and you too could grow to hate it. Add to this the fact that Aslan Eshanov is based in Norway and it becomes clear. These guys don’t think like us.
They go their own way, which is why so many insane cars appear from the frozen lands of northern Europe. Anyway, when you’ve got a nice five-cylinder sitting in the garage, it would be rude not to make use of it. But there’s more to this story than a simple track project build…
The RS4 was actually impounded by the police after they discovered it had a false chassis number. Aslan was prosecuted and fined 23,000 euros (the price of the car’s import tax to Norway). Gulp. So, he hired a lawyer and fought the case in court, proving it was the previous owner who had committed the fraud. However, after a total of 60,000 euros had been spent, Aslan was told that he still could not use the RS4 on the road unless he paid a further 23,000 euros. “I could not afford to do this, so I decided to build a full track car,” he says. So before anyone shouts, “what a waste of an RS4” – it was either build a full-on track weapon, or it would never be used at all.
The project began in July 2014 in Aslan’s basic, unheated garage with only ordinary tools. “I worked a lot in the summer, but not so much in the winter as it was -20 outside and still -10 in the garage.” He spent around 14 months on the car, having to work much of the details out for himself as well as fabricating many bespoke parts.
You can read the full engine spec on the last page of the feature, but it’s based around a 2.5 TDI block, with forged rods and pistons. There’s an AAN cylinder head and CatCams that allow this strong bottom end to withstand a 10,000rpm rev limit. Everything needed to be strong, because Aslan likes to give it a serious kicking. You may have seen videos of it being nailed sideways around the track at various Gatebil events.
Watching this RS4 performing brutal four-wheel power slides never gets old and with 939hp on tap, it’s some crowd pleaser. Listening to that beefy, Precision turbo snorting and chuffing away, accompanied by the roar from the 3.5in exhaust really is something special. It’s a raw, unrestrained sound that is all the better for being produced by an engine with an odd number of cylinders.
Thankfully, the outside has been left pretty much OEM. The only additions are a Leon Cupra front splitter, some tow straps and US-spec side marker lights. The fact it isn’t covered in some crazy livery or emblazoned with sponsor’s logos, only adds to the appeal of this RS4.
Inside it’s a different story. The dash remains, but pretty much everything else has been removed to make way for a comprehensive roll cage and the fuel system, mounted in the boot. There’s even a rear-mounted radiator, inspired no doubt by the Group B cars of the ’80s. Sensibly, Aslan has installed a firewall, to keep himself away from the fuel system.
The wheels are as wide as possible to allow for maximum traction – they measure a girthy 10.5x19in all round, wrapped in 275/30 semi-slick track rubber. However, a set of 18in Rotas are used for drifting with smaller 235/40 tyres.
There’s plenty more to come from this rather immense RS4. It’s an unconventional car, with a chequered past, but there’s no denying that it is 100% savage. Aslan reckons there’s another 200Nm of torque to be had, so it’s set to become even more of an animal on track. It’s a shame it can never be used on the road in Norway, but I guess that means that it’s never going to be a compromise. This RS4 is all about going insanely fast (often sideways) and for that, I give it a big nod of respect.
SPECIFICATION / #Audi-RS4-B5 / #Audi-RS4 / #Audi-A4-B5 / #Audi-A4 /
Engine Self build 5-cyl 2.5 20v Turbo, 2.5 TDI long block from 94-97 A6 (same block as Transporter T4) with custom CP-service pistons and #Rosten-Performance H-profile rods, #Audi-Ur-S4-AAN cylinder head from S4 C4 91-94 rebuilt to mechanical lifters and #CatCams for higher lift on valves and can run 10,000rpm, modified #AAN intake manifold from 2.2 20v S4 C4, Nuke fuel rail with 1600cc #Bosch injectors, custom exhaust manifold for B5 with 5-cyl engine, #Precision / #Precision-6466CE turbo, Tial 60mm wastegate, #Tial Blow-off valve, 3.5in exhaust all the way and 2x 3.5in tailpipes (Diesel look), 4in intercooler, big oil catch tank with return line for oil back to the oilpan, #Autronic-SM4-ECU , Audi R8 coils, #Accusump oil accumulator (stabilizes the oil pressure in engine)
Transmission OEM RS4 B5 transmission, OEM drive shafts, Tilton 2-plate clutch good for 1500hp
Power 939.8bhp and 983Nm at 2.3bar of boost on E85 fuel
Brakes RS4 B7 brakes in front, OEM rear brakes, hydraulic handbrake
Suspension #Øhlins 3-way coilovers, #H&R ARBs front and rear, #PowerFlex bushings / #Öhlins / #Ohlins-Racing
Wheels & Tyres #BBS-CH / #BBS 10.5x19 with 275/30x19 semi slicks, OEM RS4 and Bola B1 (Rota grid) drifting wheels with 235/40x18
Interior OEM dash, #Sparco / #Sparco-Pro-2000 black seats, Sparco 4-point red belts, full “rally” roll cage, rear mounted radiator with water pump in boot, 3x #Bosch-044 fuel pumps for E85 fuel, 60-litre fuel cell, Nuke fuel catch tank, 2x #Nuke fuel filters, firewall between boot and rear of cabin
Exterior Leon Cupra front spoiler, US side marker lights, tow straps, tinted windows, OEM paint
Tuning contacts/thanks Tuned by #RFS-Performance in Norway. 939.8bhps and 983Nm at 2.3bar of boost on E85 fuel (not finished with the tuning, need to adjust cams to push out around 200Nm more)
Top: Cheeky on-road shot of this epic track car
Below: The plate gives the game away...
Left: Rear firewall and extensive roll cage Below Left: Interior is driver focused.
Bottom: Just a regular RS4...
Above: Aslan kicks the RS4’s arse on track.
Action photographs: Bjorn Eirik Odegård
Below: Rear-mounted cooling system.
“The RS4 was actually impounded by the police...”
Below: View through the rear window gives the game away.Stream item published successfully. Item will now be visible on your stream.
- Post is under moderationUltimate Sleeper 668bhp S2-engined 90 quattro. Words and Photography Davy Lewis. 80s Revival With the help of a 668bhp S2 engine, this rare #1986 Audi 90 has been brought slap bang into the 21st century. AUDI 90 668bhp S2-engined sleeper.
At first glance, this may look like a fairly stock and well used Audi 90. This in itself is worthy of attention as there are very few of these mid-’80s saloons left. It’s also a quattro, which makes it even more of a find. The simple, boxy design is everything you’d expect from a 30-year old car – it has the original paintwork and that distinctive smell that only an old car can have. But look more closely and all is not as it seems. The clues are there: the Aerocatches on the bonnet; the motorsport style wheels and those sticky Toyo R888 semi-slicks. But it isn’t until you see the engine that you realise just how special this thing is.
Lift the bonnet and you’re greeted by a fantastic looking 2.2 5-cylinder 20v lump complete with big turbo. These saloons may have originally come with a 2.2 unit but, the normally aspirated KV lump made a lowly 136bhp. This one produces 668bhp. This is actually an S2 3B engine, and to say that it’s been tuned is an understatement. Will from VRS Northampton has completely transformed this 5-cylinder unit to create a big-power, but highly usable car that fits Stuart’s Elliott’s driving style.
Stuart takes up the story, “I’ve loved Audis since my dad had them,” he recalls. He had a 100, then a 90, before getting a 90 quattro, which I learnt to drive in,” he says with a big grin.
While his mates were driving old Mk2 Escorts, he had the keys to the quattro, which must have really been something back then. Fast forward 20-odd years and Stuart was in a position to relive his youth. “I was working offshore and stared looking on eBay for 90 quattros,’ he says. “I found one that had already had the S3 3B engine conversion – it looked a bit rough and had a stock gearbox, brakes and suspension but, I put a bid in.”
Being six hours ahead he won the car and called his dad to go and pick it up for him. We all know eBay purchases can bite you on the arse, but the car was as described. It was also well known on the S2 forum, so there was a wealth of info available. “I came home and drove it for 100 miles or so just to see what it needed,” says Stuart. “It was running about 280bhp, but with stock brakes and suspension, that wasn’t a good thing,” he laughs.
Having decided the car deserved some proper love, it was sent to a company who ‘talked the talk’ for some renovation and tuning work. Sadly it then sat there for a year and made no progress. Having bought an uprated radiator from Will at VRS Northampton, Stuart told him about his predicament and Will told him to bring it to him. That was the best decision Stuart could have made.
VRS has a great reputation for building some of the most capable VAGs in the UK. Main man, Will, takes real pride in each car and this 90 became a true labour of love.
“We decided to start from the arse-end and work forward to see what needed doing,” says Stuart. “I’d already had some welding done to the offside rear arch and the fuel pump area,” so the upgrades could begin.
“The plan was to create a quick road car with 500-600bhp that looked stock, but could have a go at Porsche 911s and the like,” smiles Stuart.
To say he’s nailed it is an understatement. In fact, I can’t think of many other cars that offer such ballistic performance, all wrapped up in such an innocent looking package.
The heart of this ’80s powerhouse is the S2 engine. It was actually fitted by a previous owner, but has been completely reworked by VRS. You can see the full details in the spec panel at the end of the feature, but the highlights include a fully forged bottom end, beefy GTX3576 turbo, huge 1100cc injectors and a feature packed MoTec ECU mapped by the legend that is, Dave Rowe, from EPS. “There are nine boost settings,” says Stuart. “One to six are for regular super unleaded pump fuel; while seven to nine have advanced timing to allow race fuel to be used.” With nine different maps, there’s something for every situation, making this a very usable and drivable car. “You can just do 30mph with no bother,” says Stuart “and it’ll cruise in sixth on the motorway fine – you don’t get out of it with a headache!” But when you do want to drop the hammer, this 5-cylinder monster delivers a huge punch. Stuart continues, “Using it in the gears it’s savage – in third gear acceleration is brutal and it’ll hit 100mph plus (on a private road of course). A powerful engine is one thing, but unless you can get that power down, it’ll never make for a truly fast car. Fortunately, the chassis and drivetrain has been suitably beefed up to cope with all 668bhp.
To transfer the power to the road, a B5 RS4 gearbox has been fitted. Mated to a VRS Northampton-spec 6-paddle clutch and flywheel, this thing properly hooks up and goes. With launch control and Toyo R888 rubber, acceleration is mind blowing. On many shoots it’s hard to get a feel for how a car actually performs, but as we’re at Santa Pod for the GTI Festival, I get to watch Stuart take it down the strip.
Before Stuart hits the quarter-mile, he spends a few minutes prepping the car. By prepping, I mean removing seats. The rear bench is taken out, followed by the passenger leather Recaro. Incidentally, the front seats are from an RS2 and as Stuart says, “weigh a bloody ton!”
He’s the first to admit he launches it sympathetically, but once it gets into its stride, this thing is quick. A few runs in the high 11s are respectable but, we all know there’s more to come. After a quick chat with Will from VRS, Stuart uses launch control and nails an 11.1sec pass. Impressive stuff – more so when you consider he then drove over 200 miles home afterwards. With some more practice, and an aggressive launch, this thing has the potential to dip into the 10s – seriously impressive for a full road car.
As he waits in the queue for his next run, Stuart spots a very tidy looking Ur-quattro and stops to chat to the owner. It turns out they know all the same people from the quattro Sport and S2 forums and spend a good 20 minutes chatting about their plans. Before long there’s a small crowd of onlookers. Seeing these two cars together is a rare treat; from middle-aged guys who owned one back in the day, to younger fellas that have been seduced by the iconic lines – everyone loves these ’80s treasures.
The chassis has seen some extensive work to create something with contemporary handling. There are no off-the-shelf coilovers available for these things, so rather than go to the trouble and expense of having a bespoke set created, Stuart fitted S2 subframes. These allowed the well respected KW Variant 3s to be added. With two-degrees of negative camber, the turn in is crisp and sharp, making the already capable quattro handle amazingly well.
The paintwork is best described as original. It has a certain patina that adds to the overall character of this car. There’s the odd mark and rust spot, but it’s authentic. Plus this saloon gets used. Hard. Although Stuart is planning to have a few bits tidied, it’ll remain original. “It still had the tow bar on until two weeks ago!” he reveals, “I only removed it cos it weighs 20kg.” Talking of weight, the kerb weight on this thing is just 1200kg. That gives a power to weight ratio of 556bhp per ton, that’s better than a Ferrari 458 and a McLaren F1.
So what’s next for this 1980s sleeper? Well, after five years in build, Stuart plans to use it as much as he can. That means more quarter-mile runs, some track days and plenty of cross country runs on the road. “I’m going to have the leather removed from the front seats too,”says Stuart. “I’m not a fan of leather, plus these things get hot inside,” he laughs. With some tweed cloth to match the rears, this Audi 90 will look even more period correct, further cementing its status as one of the UK’s finest sleepers.
It’s so good to see a car like this being kept alive, but more than that, being given a new lease of life thanks to modern tuning upgrades to create an absolute weapon.
SPECIFICATION #Audi-90-Saloon / #1986 / #Audi-S2-3B / #Audi-90 / #Audi-90-B2 / #Audi-Typ-81 / #Audi-Typ-85 / #VAG / #Audi-80-B2 / #Audi-80 / #Quattro /
Engine S2 3B 2.2 20v turbo, overbored 0.5mm, #Mahle pistons, forged steel rods, ported cylinder head, VRS-spec cams, stock valves with 5 angle seats, #ARP head bolts with sport #Quattro washers, VRS custom fuel injector rail, #ASNU 1100cc injectors, Audi 7A cam cover machined to accept B7 RS4 coil packs, ARP studs and nuts, #Wagner inlet and exhaust manifolds, #Turbosmart 50mm wastegate, 4-port boost control, #GTX3576 turbo with 0.82 housing, #VRS custom stepped ‘L-shaped intercooler with lightweight core, Turbosmart BO V, #CatCams vernier pulley, motorsport kit sensors – fuel, oil, 4 bar map sensor, custom 65mm core rad, Kenlow fan, custom heat shielding, carbon/Kevlar cam pulley cover, custom VRS 3in exhaust and downpipe, 19 row #Setrab oil cooler, #Aeroquip fittings, VRS custom breather tank, #Motec-M84 SLM shift light, #MoTec-M84 ECU / #Motec , custom loom, mapped by Dave Rowe from #EPS-Motorsport , 9 position adjustable boost, launch control, 2 stage anti-lag, full logging facility, custom VRS strut brace
Power 668bhp and 519lb/ft DIN (tested)
Transmission 6-speed B5 RS4 gearbox, VRS-spec 6-paddle clutch and flywheel, 16-row Mocal gearbox cooler just in front of drivers rear wheel
Brakes Brembo custom calipers with 314mm discs (front), vented S8 mix rears
Suspension KW Variant 3 coilovers, S2 Coupe ABY subframes front and rear, Powerflex bushes, 2-degrees negative camber
Wheels and Tyres Compomotive TH with Toyo R888 tyres
Interior Leather RS2 Recaros up front, OMP dished suede steering wheel, SLM shiftlight, boost gauge, controls for launch control and anti-lag built into centre console, battery relocated to boot, fire extinguisher
Exterior 1985 4-door Audi 90 saloon, Aerocatches on bonnet, front slam panel modified to fit intercooler, original paintwork
Contacts/thanks Will at VRS Northampton www.vrsnorthampton.com, Dave Rowe at #EPS-Motorsport
www.epsmotorsport.com, my missus, my mum and dad, S2 and Classic Audi forums
Top: Stuart on his way to an 11.1sec quarter.
“It still had the tow bar until two weeks ago!”
Left: Interior includes RS2 seats Above right: 668bhp S2 power house Below: Classic ’80s profile.
Far right top to bottom: #MoTec-ECU in glovebox; gauges and controls for LC and ALS.
“Using it in the gears it’s savage – in third gear, acceleration is brutal”
POWER TO WEIGHT
To appreciate just how fast this Audi 90 is, have a look at these power to weight comparisons. With up to 500kg less to pull around, but similar power, the 90 would be at a huge advantage over these £100k plus supercars...
2016 Porsche 911 Turbo S 991.........................344bhp per ton
2016 Ferrari 458 Speciale..........................470bhp per ton
1992 McLaren F1.......................................550bhp per ton
1986 Stuart’s Audi 90.................................556bhp per tonStream item published successfully. Item will now be visible on your stream.