Lighter, faster and more agile: that’s the buzz on the new 2013 Porsche 911 Carrera 4 and 4S, the all-wheel-drive versions of the world’s greatest sports car.

The Carrera 4 and sportier Carrera 4S are both available in Coupé and Cabriolet variations.

They have the same basic traits as the rear-wheel drive versions—lightweight body design, suspension, engines and gearboxes—with the traction control one expects of an AWD model.

Meanwhile, Porsche has improved fuel economy by some 16% over last year’s models.

The most distinct feature of the 911 with all-wheel drive is the wider rear section.

Compared to the two-wheel drive 911 Carrera models, the rear-wheel housings each extend further outward by 22 mm for a total of 44 millimeters, and the rear tires are each 10 millimeters wider.

It may not sound like much, but to 911 fanatics it’s a big deal…