For the latest generation, BMW is offering the M3 as a sedan and is spinning the coupe off as a separate model called the M4. Both were presented for the first time at the Detroit Auto Show in January and, save for the extra pair of doors, are virtually identical.
Replacing the high-revving (and gas-guzzling) 4.0-liter V8 in the outgoing M3, the new model packs a 3.0-liter turbocharged inline-six. But don't let the drop in displacement and cylinder count fool you: the new turbo six produces 425 horsepower and 406 lb-ft of torque – more than any M3 that came before. In fact the original M3 offered less than half the new model's output. It's also slightly more powerful, significantly torquier, much more usable and vitally lighter in weight than the high-revving V8 in the model it replaces.