The 2013 M5 is powered by a high-revving 4.4-liter turbocharged unit that uses the BMW M TwinPower Turbo technology. The engine outputs 560 horsepower from 5,750-7,000 rpm and 680Nm (502 lb-ft) of torque from only 1500rpm. It comes in both manual and 7-speed DCT transmission. The base price of the F10 M5 is $90,695, but the model tested came close to $105,000.
The $146,000 Panamera GTS (as tested) is powered by a naturally-aspirated direct-injection 4.8-liter, 32-valve DOHC V8 with variable valve timing/tift and dry-sump lubrication mated to a seven-speed automated manual gearbox (PDK). The engine produces 430 hp at 6,700 rpm and 384 lb-ft of torque at 3,500 rpm.
Here is an excerpt from the review:
Speaking of the real world, it’s here the two cars become quite different monsters. The Panamera GTS has it all over the M5 in driving pleasure. Most notably, the Porsche’s steering feel is worlds better. When you push it, as with all great cars, the GTS feels as if it shrinks around you. The Porsche therefore is easier to place, responds more fluidly, and is just more fun to drive. The M5 has three steering modes, but there’s no Goldilocks setting. Comfort mode is vague to the point of why’d they even bother? Sport mode offers more heft, but still feels imprecise. The heavy Sport+ mode (don’t you love how original the Germans are with their nomenclature?) offers the best steering feel, but everyone agreed it was still too artificial. Which is a crying shame, as for decades the whole reason you went with a BMW was because of the world-class steering.
Also unsettling is how the two cars go down a given stretch of road. Says Febbo, “Forget everything you know about driving smooth in the M5. Grab the thing and throw it around like you hate it. You need to turn in aggressively, jab the brake pedal, and get into the throttle hard. You can’t just flow from corner to corner in switchbacks. You absolutely have to accelerate hard out of turns. You need to use the brakes to settle the front end — no coasting!” Like all of us, Evans felt the M5 just drove too big. Whereas the GTS “[Is] just the opposite, lithe and well-controlled, driving smaller than it is.” What strikes me, looking at the notes, is not how many good things we all had to say about the Panamera GTS (aside from price, almost everything was positive), but how many bad things we had to say about the way the M5 drives. Why is that?