There’s a lot to like about the new GT3 RS including the fact that it is fitted with the largest engine ever to be mounted on a factory-approved 911; a 4.0-liter naturally aspirated flat-six unit that develops 500 horsepower at 8,250 rpm, 50 horses more than the standard GT3 RS. It is also the most powerful 911 naturally aspirated engine with 125 horsepower per liter. The engine carries the crankshaft from the 911 GT3 RSR racing car, while the forged pistons' connecting rods are made from titanium.
You see, Zagato’s TZ3 Stradale is an Alfa Romeo bodied sports car based on the platform and mechanical hardware of the track-conquering Dodge Viper ACR, which features the same 600HP 8.4-liter V10 engine as the standard Viper SRT-10 along with a 6-speed manual gearbox and a race-spec suspension. All parts of the TZ3 Stradale’s carbon fiber body are new with the cherry topping being the classic Kamm-tail (K-tail) layout.
