Both cars sit in a similar price bracket, but performance is where the McLaren 750S and Porsche 911 GT3 RS truly diverge. To settle the long-standing question of straight-line supremacy, the folks from CarExpert on YouTube lined them up for a quarter-mile drag race and a rolling race.
The Porsche 911 GT3 RS counters with a naturally aspirated 4.0-liter flat-six making 518 horsepower and 465 Nm. What it lacks in outright power, it makes up for with razor-sharp aerodynamics, a motorsport-derived chassis, and the unique Drag Reduction System that flattens its rear wing for straight-line speed. It, too, sends power solely to the rear wheels via a seven-speed PDK transmission.
The McLaren 750S arrives with a twin-turbocharged 4.0-liter V8 producing 740 horsepower and 800 Nm of torque. Power goes to the rear wheels through a seven-speed dual-clutch transmission. With a lightweight carbon structure and aggressive gearing, it is built to produce explosive acceleration.
On the first run, the McLaren unexpectedly drops into limp mode, giving the Porsche an unearned win. After an engine restart, the second attempt shows the true gap: the 750S launches hard and simply disappears, its turbocharged torque overwhelming the GT3 RS’s high-revving six.
A third race plays out the same. Even with the Porsche’s aero settings tweaked and its driver timing the launch perfectly, the McLaren’s power-to-weight ratio leaves no room for a close battle. For a fourth run, the McLaren deliberately avoids launch control to mimic a casual street start, yet the Porsche still struggles to gain more than a momentary advantage before being overtaken.
A rolling race from 30 km/h ends identically. Even with an early jump, the GT3 RS cannot hold off the McLaren once boost arrives. Quarter-mile runs later confirm the result: the GT3 RS is an elite track machine, but in a straight-line duel, the 750S operates on a completely different level.
