Safari-style Porsche 991 911 Turbo S packs hybrid power

Hybrid Porsche specialist Vonnen has revealed a Safari 911 built by its first dealer partner

Vonnen hybrid Porsche 911 Turbo S Safari

Vonnen is a Silicon Valley company, but not in the way you might think. It builds hybrid Porsche 911s to make them faster.

Now Vonnen has announced its first dealer partner, a Wisconsin-based Porsche specialist called Kelly-Moss Road and Race, or KMR for short.

To celebrate the agreement, KMR used Vonnen’s hybrid system called Shadow Drive to build a ‘safari-style’ 991 911 Turbo S with 524kW.

The Shadow Drive system isn’t a normal hybrid system however, it’s actually an integrated electric motor between the engine and transmission, which means the system doesn’t require a huge amount of weight addition (between 50 and 100kg) and means the combustion engine become less involved. The new electric motor also replaces the starter motor.

Vonnen says it “combines the sounds and tactile experience of driving a combustion engine powered car with the instant response, wide powerband, and energy recovery features of an EV, supplying an extra 150 horsepower and 150 ft-lb of electric torque.”

For a standard 2014 model Turbo S, the Porsche’s twin-turbo 3.8-litre flat six goes from a 412kW/650Nm output to a 524kW/853Nm output. But not this one.

Vonnen Hybrid Porsche 911 Drivetrain Jpg

KMR hasn’t stopped at just the new electrified drivetrain. It’s gone on to replace the two turbos with higher spec Xona rotor turbos, replaced the wastegates and intercooler, as well as headers and the rest of the exhaust, plus it’s had some obvious suspension work (coilovers, primarily) and a lightbar installed for a proper rally vibe.

KMR operations director Andy Kilcoyne say Vonnen’s Shadow Drive System is both “impressive and addictive,” and is looking forward to bringing it to customers.

“The ability to boost power without trading off fuel economy, emissions, and drivability really sets it apart from traditional power adders,” says Kilcoyne.

“It’s like adding the instant torque of a Tesla to the raw driving excitement of a Porsche, the best of both worlds.”


How are you finding our new site design? Tell us in the comments below or send us your thoughts at


Subscribe to Motor magazine

Subscribe to MOTOR and save up to 49%
The world's most thrilling performance car magazine. Delivered to your door each month.



We recommend


2022 Audi RS 3 technical details revealed

Drift mode engage! 2022 Audi RS3 gains torque vectoring rear axle

Updated Audi RS3 gains active rear-axle torque vectoring and drift mode!

6 mins ago
Alex Affat
Please enable JavaScript to view the comments powered by Disqus.