It shares many components with the E46 BMW 3 Series , and were available with a 4-cylinder 1.8 litre petrol engine , 6-cylinder 2.0 and 2.5 litre petrol engines , a 8-cylinder 4.6 litre petrol engine and 4-cylinder 2.0 litre turbodiesel engines . Under the lauded styling was a range of petrol and diesel engines from 1.8 to 2.5 litre sizes . Petrol engines provided were Rover 's 4 cylinder K series in 1.8 litre guise and the quad cam KV6 , offered in either short stroke 2.0 or revised 2.5 litre formats .