What sort of performance do the M3 and M4 offer, and how do they work under the hood? We’ve analyzed all the similarities and differences so that you know exactly what you should buy.

The M3 is based on the four-door three series sedan/ wagon, while the M4 is based on the two-door 4 series coupe/convertible. There is a four-door M4 Grand Coupe. Disclaimer: You acknowledge and agree ...