Lotus Carlton: the 176mph Vauxhall they tried to ban (1990–1992) The Lotus Carlton was a Vauxhall saloon rebuilt by Lotus around a twin-turbo straight-six, 377bhp, 176mph, faster than contemporary Ferraris with five seats, and so quick the press and Parliament called for it to be banned. A guide to how it was built, the ban campaign, the famous crime spree, what to check, and what one costs now.