They may not be lookers, but there is no denying the performance credentials of Roland Gumpert's Apollo sports cars. With the base 650-hp engine package, the brainchild of the former director of Audi Sport is capable of reaching 60 mph in less than three seconds with a top speed or more than 200 mph.

But now Gumpert is planning to reveal a faster chapter in the line at next month's Geneva motor show with the Apollo Speed. Slipperier aerodynamics and a lower ride height allow the Speed to top 224 mph.

Among the changes to the mid-engine supercar is a redesigned front fascia with a larger spoiler, massaged wheel arches, a low-restriction air-intake system and an adjustable rear spoiler. The Apollo Speed also sports a 0.36-inch lower ride height compared with its Apollo Sport and Apollo Race siblings. Speed versions also gain new rear taillamps.

Of course, your Apollo's top speed will depend on what engine package you pick. Starting with an Audi-sourced 4.2-liter V8, Gumpert then bolts on twin turbochargers that can be tuned to provide 650 hp, 700 hp or 800 hp. Harnessing the power to the wheels is a six-speed dual-clutch transmission.

Gumpert did not release pricing for the Speed, but the base Apollo models begin at roughly $385,000.