Vauxhall Carlton MkII / Opel Omega A
Opel chose to name its 1986 replacement car in this segment Omega rather than Rekord. Vauxhall stayed with the Carlton name. On its launch in November 1986 the Vauxhall Carlton / Opel Omega saloon and estate range earned itself the accolade of European Car of the Year - the second Vauxhall/Opel product to achieve this distinction, two years after the Astra/Kadett won the accolade.
Relationship with other models
Again there was a lengthened version of the Carlton (and Omega), this time known in both Opel and Vauxhall forms by the same name: Senator.
Vauxhall scrapped the Carlton nameplate in early 1994, but the name of its Opel equivalent, the Omega, lived on, as it was applied to the Carlton's replacement. At which point the Vauxhall equivalent adopted the name change (a drive towards uniformity was taking place throughout the range) and so the Carlton's replacement was sold as the Vauxhall Omega.
Mark II engine line-up
All of the 4-cylinder engines available in the Carlton Mk II were the GM Family II units in 1.8L and 2.0L capacities. The Opel Omega A was offered with a large 2.4L Opel CIH engine in certain European markets, but this variant was never offered in the Carlton. New to the Carlton's line-up with the Mark II were two straight-6 engines with 2.6 and 3.0–litres. These were both 12-valve engines, again from the Opel CIH family, but later 3.0-liter models were offered with 24-valves, producing much more power and torque. As well, Vauxhall used the "Dual-Ram" intake manifold, which lets the car breathe as two separate three-cylinder engines below 4,000 rpm, but changes the intake manifold profile at 4000 rpm to increase the runner length, thus increasing total engine output.
In addition to the straight-6 engines there was a range of straight-4s. Starting with GMs popular 2-litre family 2 engine, the C20NE, with 115PS and 125lb.ft torque. There was also a 2.3 turbo diesel available with 100PS and 160lb.ft torque.
Special Lotus version
Main article: Lotus Carlton
In 1990, Vauxhall launched a high performance 377 bhp (281 kW) Lotus Carlton in collaboration with Lotus Cars. (An Opel version was also produced as the Lotus Omega.) It was built with a 3615 cc six-cylinder twin-turbo engine (designated C36GET) capable of over 176 mph (283 km/h), making it officially (for the time) the fastest full four-seater that had ever been made. It cost £48,000 – well over double the price of a standard Carlton. As a result, Vauxhall's original plans to sell about 1,000 in the UK ended in 440 UK cars being sold. For those with less money there was the 3000GSi 24v, with a top speed of 146 mph (235 km/h).
GSi 3000 & Diamond
Prior to the Lotus tuned version, the range topper was the GSi 3000 upon which the Lotus Carlton was based. At launch in 1986 it had 177 bhp (132 kW; 179 PS) giving it a top speed of 134 mph (216 km/h). In 1990, power was increased by going from 2 valves per cylinder to 4 valves per cylinder, creating a 24-valve engine, resulting in 204 bhp (152 kW; 207 PS) which allowed 0-62 mph to be dispatched in 7.6 seconds and increased the top speed to 149 mph (240 km/h). It was also available with an Automatic gearbox, which reduced the top speed to 146 mph (235 km/h) and increased the 0–62 mph time to 8.6 seconds. The Carlton Diamond 3.0 24v Estate was also made. Identical to the GSI but with an estate body shell, it sold in much more limited numbers (90) and so is a much rarer sight.
Guinness World Record
In June 1992 two teams from Horley Round Table, Surrey, UK, set a Guinness World Record time of 77 hours 34 minutes, driving a total 6,700 km across the then 12 EC countries in two Vauxhall Carlton 24V 3000 GSi's (J870 FFM and J751 DYC). The Carltons were provided by Vauxhall Motors and the record attempt was also supported by Mobil Oil and the Royal Automobile Club.
By February 2016, just 468 examples of the Carlton were still on Britain's roads, with most remaining examples believed to be the high performance 3000 GSi and Lotus versions of the MK2 model.