2014 Porsche 911 Turbo

On the 40th anniversary of the first 911 Turbo, Porsche rolled out its newest incarnation of the line-topping sportscar, complete with larger dimensions, more power, new performance features and more. The 2014 Porsche 911 Turbo and 2014 Porsche 911 Turbo S now join the rest of the 911 lineup on the new 991 chassis.

Like the other 911 models, which launched in the new body style for 2012, the new Porsche 911 Turbo rides on a wheelbase that's stretched about four inches, and an overall length that's increased by two inches. The roof is lower and the track is wider. In fact, the new Turbo is even wider than the other 911 models, by more than an inch compared to the current 911 Carrera 4. Porsche says it's the widest body 911 yet.

Power gets a bump thanks to a new turbocharged 3.8-liter six-cylinder engine with direct fuel injection, good for a heart-thumping 520 horsepower in the Turbo and 560 hp in the Turbo S, up from 500 and 530, respectively.

Porsche also refined its dual-clutch PDK transmission and added fuel-saving technologies including a new thermal management system and an auto stop/start feature, which Porsche says will kill the engine sooner, as the car is coming to a stop (as opposed to waiting until idle). Although EPA fuel economy hasn't yet been released, with these updates Porsche expects fuel economy to improve over the previous model.

New technologies include a revised all-wheel-drive system, which sends more torque to the front wheels, and rear-wheel electromechanical steering, which varies the steering angle depending on speed. Like the other new 911s, the newest Turbo and Turbo S should be easier to drive than previous generations. Enthusiasts may or may not agree, however, on whether that's a good thing.

Although the look is new, it retains all of the classic 911 Turbo styling cues. Headlamps have a bit more of a three-dimensional look, in keeping with a body that is more sculpted than before. Headlamps are full LEDs. The sheet metal has a more precise and taught feel, with a cabin that has moved ever so slightly forward. It also rides on new, larger, 20-inch wheels.

Not dissimilar to modern racecars, the 911 Turbo and Turbo S use what Porsche calls an active aerodynamic system. A front spoiler and the familiar deployable rear wing can each be set in one of three positions, allowing the driver to choose between maximum efficiency or performance. Porsche says the Turbo was able to gain two seconds on Germany's famous Nurburgring Nordschlife during testing with this system alone.

The interior was also revamped. Leather upholstery comes standard in the new Turbo, and a new black/red combo with sport seats come on the Turbo S. A Bose audio system now comes standard on both models. New options include an upgraded Burmester stereo system, radar-based cruise control, camera-based road sign recognition and speed limit recognition.

The 2014 Porsche 911 Turbo and Turbo S are expected to be available in dealerships at the end of calendar year 2013. As with all Porsches, performance doesn't come cheap. Porsche announced MSRPs start at $148,300 for the Turbo and $181,100, plus a $950 destination charge.