Lotus Carlton

Lotus Carlton
Omega av.jpg
ManufacturerLotus (General Motors)
Also calledOpel Lotus Omega
Vauxhall Lotus Carlton
AssemblyUnited Kingdom: Hethel, Norfolk
Body and chassis
ClassSports saloon
Body style4-door saloon
LayoutFR layout

Opel Omega AHolden Commodore VN

Holden Commodore VP
Engine3.6 L C36GET I6 TT
Transmission6-speed ZF S6-40 manual
PredecessorLotus Cortina

The Lotus Carlton (other names include Vauxhall Lotus Carlton, Lotus Omega and Opel Lotus Omega) is a Vauxhall Carlton/Opel Omega A saloon upgraded by Lotus to be a 177 mph (285 km/h) sports saloon with acceleration to equal contemporary supercars. Like all Lotus vehicles, it was given a type designation—Type 104 in this case. The external differences were minimal with the addition of a rear spoiler, vents on the bonnet, Lotus badges on the front wings and bootlid, a bodykit and considerably wider wheel arches distinguishing it from a standard Carlton/Omega.[1] The car was only sold in one colour, a shade called Imperial Green, a very dark green that in anything but direct light appears black.

Engine and drivetrain

Carlton engine bay
Lotus Omega

Performance modifications started with an upgraded engine, which was enhanced by Lotus from the standard Opel 3.0 L (2,969 cc) 24v straight six unit (used in the GSi). The engine was enlarged to a capacity of 3,615 cc (3.6 L; 220.6 cu in).[2] Lotus then added Garrett AiResearch T25 twin-turbochargers, which provide up to 0.7 bar (10 psi) of boost from about 1500 rpm. The original distributor ignition system of the engine was replaced with a three-coil wasted spark system. The distributor drive was re-purposed as a water pump drive for the water-air intercooler circuit. The intercooler itself is manufactured by Behr and is capable of reducing the temperature of the compressed charge from 120 °C (248 °F) to 60 °C (140 °F).[3][4]

In addition to fitting two turbochargers and an intercooler system, Lotus directed a number of engineering changes to the engine so that it would perform reliably with the higher power output. To cope with the higher cylinder pressures (about 95 bar (9,500 kPa)), the external webbing on the engine block was reinforced. The crankshaft was replaced as well; early development crankshafts were machined from billet steel in Italy, but the production units were forged by Opel and sent to Maschinenfabrik Alfing Kessler for machining. The cylinder head was left mostly the same as the 4 valves per cylinder from the Opel Omega, although the combustion chamber was milled to reduce the static compression ratio to 8.2:1 (from 10.0:1). The engine is fitted with forged slipper pistons produced by Mahle. Piston connecting rods were replaced with new units made to an original Lotus design.[3]

The same ZF 6-speed manual transmission as fitted to a contemporary Chevrolet Corvette ZR-1 was used to transfer this power to the rear wheels via a rear limited-slip differential from the V8 Holden Commodore.

Other Languages
العربية: لوتس كارلتون
Deutsch: Lotus Omega
Ελληνικά: Lotus Omega
français: Lotus Carlton
italiano: Lotus Carlton
polski: Lotus Omega
português: Lotus Carlton
русский: Lotus Omega
slovenčina: Lotus Omega
svenska: Lotus Omega
українська: Lotus Omega