Lotus' first and only-ever 4-door sedan was badged the Lotus Omega (left-hand-drive versions) or Lotus Carlton (RHD.) Based on the European Car of the Year award-winning Opel Omega and Vauxhall Carlton twins, it was the fastest regular production sedan in the world, and that caused major controversy in the socioeconomic class-conscious United Kingdom. 180-mph supercars like the Ferrari Testarossa had already been around for years, but when a pedestrian brand like Vauxhall endeavored to sell a sedan that could be purchased by non-aristocrats, it rocked the establishment. Still, the Lotus Carltomega was a tour-de-force, offering 377 hp — 2 hp more than the also Lotus-engineered, 4-cam, 32-valve, 5.7-liter LT5 V-8 from the C4 Corvette ZR-1. The Carlton/Omega sent that outrageous power (and 419 lb-ft of torque!) from its 3.6-liter twin-turbo, DOHC 24-valve straight-six to the rear wheels via the same ZF 6-speed manual used in that King of the Hill Corvette. It was the only 6-speed manua