This is the classic confrontation. Most of the major automotive publications have compared these 2 awesome cars to see where they currently stand. In the past, the BMW M3 has had the edge but that seems to be changing somewhat with the release of the C63 AMG.
This is a forum for AMG cars so there is obviously a bias but as enthusiasts, I think we can all respect each of these cars and what they represent.
Here's my take on the comparison based on reading and watching article/video reviews, my own experience with the 2 marques, and personal tastes.
C63 AMG:
For:
- Hard to beat in straight line acceleration. The motor is a beast in hp and torque.
- Automatic transmission. I know some will see this as a negative but can't deny that for the average driver, an automatic will allow them to extract the maximum performance and fairly easily duplicate test numbers.
- Design. The C series and the C63 AMG, in particular, is a big step forward in design for the series IMO. It is the "baby" Benz but it doesn't look like a "cheap" Benz. And with the modifications for the C63 the body takes on a very aggressive look and stance.
- Price. In the past, the AMG cars have generally been priced above the M cars. I was really surprised when the C63 came in at a base of mid $50k range. It takes the price consideration out of the equation for a buyer considering the C63 vs the M3 since they are, for all intent and purpose, same in price.
Against:
- Sedan only. The E92 M3 (coupe/convertible) outsells the E90 M3 (sedan) by a signficant margin. The lack of this choice for the C63 AMG hurts it in penetrating the segment of this market who perceive 2 doors as being more "sporty". I know some will say that there's always the CLK63 AMG but then the issue of price comes into play since the CLK AMG's are significantly more expensive than the M3.
- Not really for the track. I don't think the owner of a C63 AMG really buys the car for the track. And I'm not sure many E92/E90 M3 owners will be rushing out to the track with their $60k plus ride. But generally from the ultimate handling standpoint, I think the M3 has the edge if push comes to shove.
- Automatic transmission. I note this in both "for" and "against" for pretty obvious reasons. Some drivers want the absolute control of a manual and the fact that it's not available is a strike against.
BMW M3:
For:
- Screaming engine. A V8 with a 8k redline. Just from a technological standpoint, it's quite an achievement.
- Manual transmission or M-DCT. Manual transmission for those who want the control plus the DCT for those who want control without having to mess with the clutch.
- Handling. This has always been M3's strong point and I think it continues to lead the AMG in this area. Especially true if you plan on tracking the car.
- Design. While the design is a bit controversial, I think the CF top on the coupe is a great design feature.
- Available in coupe/convertible/sedan. Gives the buyer a wide choice in the bodystyle.
Against:
- Straight line acceleration. While it's certainly fast it will have a hard time keeping up with the C63 AMG. Torque, in particular, lags the AMG by a significant margin.
- Price. Comparable to C63 AMG when options are considered but a significant jump from the previous generation M3. This may lead to some price resistance.
- Design. Definitely one of the best designs of the recent BMW's but not enough deferentiation from the regular 3 series, particularly in sedan format.
That's my quick analysis of these 2 cars. What do you think?
Fifth Gear Video comparing the two cars
Edmunds Inside Line Comparison