sentences:  The original Plus 8 engines were Rover V8s that became available when fitted to the P5B saloon.Morgan was actually the first of a succession of sports car makers- including the likes of TVR and Marcos- to use the engine.The prototype Plus 8 (identifiable by two small bonnet bulges near the centre bonnet hinge) used a Rover V8 engine and the Plus 8 was launched in 1968 using Rover's production engine, itself a re-engineered version of the Buick/Oldsmobile 215 motor (renamed the 3.5 L by Rover) with a compression of 10.5