The Sbarro Super Twelve. Powered by two Kawasaki Z1300 engines. To quote
Sbarro "This unusual power-plant is actually made from two 6 cylinder 1300cc Kawasaki motorcycle engines. Each retains its own 5 speed gearbox and a special linkage system allows the boxes to be operated synchronously with a single gear lever. Each engine drives only one wheel and is connected to the other engine by v-belts: This minimizes variations in engine speed. The car can be run on one engine in case of mechanical difficulties." Like the gradient paintwork, perhaps influenced by
Paul Bracq's Turbo concept?
