 As in the Mini, this four-cylinder overhead valve engine was mounted transversely and had its gearbox unit in the engine's sump, sharing lubricating oil with the engine.In the Unipower GT the powertrain was mounted behind the driver and passenger and just ahead of the rear axle in a rear mid-engine, rear-wheel-drive layout.Two versions of the engine were available; a engine from the Mini-Cooper and a more potent Cooper "S" engine.