One of the major differences in the second - generation M3 was the move to the 3.0 - liter inline - six engine, which gave the car more power but also added weight. (automobilemag.com)
Some ground - effects gear and a rear spoiler could give the car more of a sporty edge. (articles.orlandosentinel.com)
Since they couldn't give me my car back, I had no choice but to keep the rental - which they over charged for. (cars.com)