I was looking through themag for this month and noticed a 2.2 Vectra with poor results on the rollers. How come as it's the same engine.
Engine: Z22SE with Remus centre pipe and Magnex back box
Claimed: 120-ish bhp
Actual: 139 bhp at 5250 rpm
Operator: "It feels flat, noticeably different from the Astra 2.2. It doesn't want to rev at all."