While the new, cheaper, entry-level 3 Series sedan was the meat and potatoes at BMW presentation today at the Detroit auto show, the company also had a couple of fancier desserts: a high-performance M version of its 6 series Gran Coupe and the concept for a new 4 Series coupe that it released photos of late last year.

BMW's M6 Gran Coupe (its sleek, Euro-style four-door "coupe") is a makeover from the company's performance M division, the heart of which is BMW's 4.4-liter, 560-horsepower, twin-turbo V-8. That's more than 100 horses more than the regular 650i Gran Coupe. It's mated to a seven-speed, dual-clutch automatic.

The M6 Gran Coupe also gets brake and chassis upgrades to go with all that power and dynamic suspension. It gets the required M appearance tweaks to give it a more aggressive look, sport seats and instrument upgrades inside and plenty of M badging and logos.

The 4 Series is actually a restyling and renaming of the 3 Series coupe, making a separate sporty line. It is slightly longer and wider than the current 3 coupe and will have more features and go more upscale. There are not a lot of details being shared yet, but the concept is a looker.