Check this page out.
http://www.super7thheaven.co.uk/blog...v8-dimensions/
"The Rover V8 basic dimensions:
Length : 708 mm
Height : 707 mm
Width: 770 mm
Weight: 220Kg (minus starter & flywheel)
Power: 150 – 230BHP (ignoring the TVR 5.0 version)
Lexus V8 4.0 quad cam 32 valve V8 basic dimensions:
Length : 655 mm
Height : 610 mm
Width: 620 mm
Weight : 177Kg (minus starter & flywheel)
Power : 256BHP -305BHP
Don't forget the Lexus comes in sohc and dohc variants and the rv8 is annoyingly wider when the exhaust manifolds are fitted.