Wiesmann->ke1344's MF5 GT replacement has already been caught testing at Nurburgring, and since that secret has become known, the company figured they might as well offer up some official details on some of the other future models.

In an official press release, Wiesmann confirmed that the next MF4, both GT and Roadster, would be offered with a BMW sourced 4.4 liter V8 twin turbo direct injection petrol engine that will deliver 407 HP at 5,500 to 6,400 rpm. With this new engine, borrowed from the X6->ke2396 and the X5 M sports SUV, the MF4 will sprint from 0 to 60 mph in just 4.6 seconds and will hit a top speed of 180 mph.

The MF5->ke2875 will get the same 4.4 liter V8 twin turbo engine with 555 HP at 5,750 to 6,750 rpm. The sports car will sprint from 0 to 60 mph in 3.9 seconds, and will hit a top speed of 193.2 mph. The new engines make the MF5 model series the most powerful Wiesmann car of all time.

Press release after the jump.

Press release

Motor replacement at the Dülmen sports car manufactory. Starting in the new year, Wiesmann will be banking on BMW twin turbo technology for their model series MF4 and MF5. The Wiesmann GT and Roadster MF4 and MF5 can now be ordered with the new engine types. These engines will be stronger and more agile, while working more efficiently and economically than their predecessors. Top priority in the selection of these new engines went to what Wiesmann is all about: unlimited driving fun.

The MF4 will now be equipped with a BMW 4.4l V8 twin turbo direct injection petrol engine. With its engine capacity of 4,395 cm³ and 407 hp (300kW) at 5,500 to 6,400 rpm, the MF4 will reach a top speed of 180.8 mp/h. It will reach 0 to 60 mp/h in just 4.6 seconds. And while doing so, these handmade sports cars create an unrivalled symphony of sound, power and sheer driving excitement.

Also the MF5 will receive an engine based on latest twin turbo technology. The top-of-the-range model will also be equipped with a 4.4l V8 twin turbo direct injection petrol engine - this one, however, with even more impressive capacity. Here are the M-motor specifications: 555 hp at 5,750 to 6,750 rpm; 0 to 60 mph in 3.9 seconds, and a top speed of 193.2 mp/h. And all that with just 10.7l per 100 km (combined) - a truly remarkable result at such performance values. The new engines make the MF5 model series the most powerful Wiesmann cars of all time.

The Wiesmann Roadster MF3 will keep its current engine (now with Euro 5), leaving the classic roadster untouched for connoisseurs of the car manufacturer for individualists.