Great question...

The e30 325 is competitive in 90% of the ITS groups nationwide, a trip to the ARRC might be a little demoralizing, but the e30 325 is a real drivers car, OK brakes that will last the race and a motor that just pulls a sweetly as any ever... I love these cars.

The e30 318 is a dog, but that doesn't matter, the motor is possibly an over built engine that can take allot of abuse, and that's what you'll need to do, you'll have to flogg the poor thing to get to the front, but shave the head, deck the block, get your allowed compression ratio increase, get someone with some 318 knowledge and go from there. A smaller brake - but it won't matter.

Remember that both of these cars are twins, or the red-headed step children to the e30 M3, so 90% of the race parts for M3's will fit this car.

If you are willing to drive like a crazy man, either car would be fun.

Expense? close...

K