Anyways, in my opinion any car would make a great track car at a lapping day, FWD or RWD, it doesn't really matter. If you're racing competitively, taking any stock car to a competitive race event is a joke. Power and speed will only benefit you once you've mastered your skills on the track. The power of your car really has nothing to do with how fast your lap times will be until you are a good enough driver.
The 2 most important things for me at any track event I'd say would be the tires and the brakes. Brake fade is scary! Don't push your car unless you know it's absolute limits. You don't want to realize you have brake fade right before a turn and a couple meters away from a concrete wall.
318 race cars are no jokes. They've been built to race in BTCC for many years and have been given the engine designation S42. The S14 (E30 M3) is a perfect example of a 4cyl BMW race car. Drive an S14 on the street, and you'll be beaten by almost every car out there. Drive it on the track, and you'll realize what makes a great track car, and what makes a great road car, 2 very different things.
I've lapped much much faster cars on the track, which just proves my point further. It doesn't matter what car you drive at a lapping day. If you can't drive and you don't know the line, it won't help even if you had an F1 car.