The Russians at Dragtimesinfo are the first in the world to put the 2019 G63 up against the older generation. Of course, we already know that AMG has made it faster, not only by adding a bit more power, but also helping the aerodynamics and lowering the overall weight. But let's look at some specs first.
The 2019 model gets 585 HP (430 kW) and 850 Nm (627 lb-ft) of torque from its 4-liter engine. This goes to the 9-speed automatic and permanent AWD. Considering this still weighs about 2.5 tons, it's amazing that it claims 0 to 100 km/h in 4.5 seconds, though it has been clocked to be even faster. Also, the Germans were confident enough to let it reach 220 km/h (137 mph).
The previous version entered production in 2015 (W463 facelift) and its best G63 setup featured 571 HP and 760 Nm (561 lb-ft) of torque. The standard sprint takes 5.4 seconds and the SUV clocks out at 210 km/h (130 mph). This is important because, by the end of the runway, the two bricks are almost maxed out.
As per usual, the Moscow drag race spans half a mile and also shows the reaction times, 60-foot time and what the vehicles managed over the first quarter-mile. The driver of the older model had a better reaction time, giving him an advantage at the 60-foot market. But power and torque play a huge part when you're racing a G63.