I have a G reg Vauxhall Cavalier SRI.
It is a 2 litre multi-point injection
8 valve engine (the 8 valve engine is stronger than the 16 valve).
The 8 valve SRI comes with 130bhp, the 16 valve SRI comes with 135 bhp, and they both have the same torque.
My SRI is red with a full body kit and Calibra spoiler. It has 17 inch alloys, a Scorpion Monza exhaust system, racing mod plugs, leads, racing hoses, Piper Cross induction kit, FSE power boost valve, racing piston rings, it's been port polished, it has 2 Superchips, one is for fuel economy, and one for performance enhancement. I've had it lowered 70 mm, which is 10 mm too much, but it is now hovering along.
This car now has 200bhp, 0-60 in 4.5sec, and a top end of 150 mph. It will go faster, but I need the 5th gear ratio changed.
All in all, I have spent £2000 on this beast, and it was well worth it.
You cannot give this car NITROS or a TURBO it, because the engine will not last. Now this car eats Cosworths for breakfast, and can hold a Subaru up to 135 mph.
So let's recap; including buying the car standard, to what it is today, it's cost me as a project £2800, and it's safe to say it's fully loaded.