This may look like a virtually stock Audi S8 D4, but wait until it hits the Autobahn. You’re not going to have that impressive acceleration in the stock version as this one has been modified by JD Engineering. That’s because the turbocharged V8 engine has been upgraded from 520 horsepower and 650 Newton-meters (479 pound-feet) of torque to 712 hp and a mountain-moving 931 Nm (687 lb-ft).
The Dutch tuner managed to turn the fullsize luxury sedan into a four-door supercar when it comes to acceleration. It did the 0 to 62 mph (100 km/h) in 3.38 seconds or about 0.8s quicker than the standard S8 D4. At full tilt, the previous generation of Audi Sport’s large sedan got up to 186 mph (300 km/h) without breaking a sweat, remaining perfectly comfortable and stable.
Seeing the speedometer’s needle doing its thing when the car is under hard acceleration is truly mesmerizing. It actually makes us wish Audi still had a traditional instrument cluster for the A8, but it’s gone and likely never coming back. As you can see, the S8 D4 continues to pull strong even when it approaches its top speed.
The gearbox’s kickdown from fourth to third unlocks more of the engine’s potential for great acceleration in a vehicle that weighs about as much as the moon. At the 0:45 mark, you can see the amped-up sedan squatting down before the driver releases the brake pedal to unleash the beast.
This S8 D4 is a textbook example of a sleeper, without ruining the attributes that make the Audi A8 one of the best luxury sedans out there. The exterior styling has aged quite gracefully and it’s that sort of car that can pretty much do everything, save for going off-road.
Now, if only Audi would make an S8 Avant… We’d also love to see an RS8, but the chances of ever happening are slim as there’s more money to be made in the SUV segment.