A few days ago, I made a post about about Motor Trend's test of the Audi S8. It does a 0-60 mph sprint in 3.5 seconds and goes through the 1/4 mile in 11.8 @ 118.3 mph.. very impressive numbers. Even more so when you look at a couple other cars: 2012 Porsche Panamera Turbo S 0-60 mph: 3.5 s 1/4 mile: 11.8 s @ 118.0 mph Power: 550 hp Torque: 553 lb-ft Weight: 4,388 lb 2012 Audi R8 GT 0-60 mph: 3.5 s 1/4 mile: 11.5 s @ 125.1 mph Power: 560 hp Torque: 398 lb-ft Weight: 3,484 lb Now let's compare those to the Audi S8 0-60 mph: 3.5 s 1/4 mile: 11.8 @ 118.3 mph Power 520 hp Torque: 481 lb-ft Weight: 4,619 lb The Panamera and R8 have weight to power ratios of 7.98 lb/hp and 6.22 lb/hp. The S8? Well, that one has a weight to power ratio of 8.88 lb/hp... The identical 0-60 time of the R8 GT and S8 can somewhat be explained by their engines' way of induction. Since the R8 is NA, the torque curve probably isn't as meaty so even though it weighs a lot less an...
I'm finishing up a comparison post (link to introduction: Intro: Focus RS vs Golf R vs WRX STI vs Evo X ) and, throughout the post, I realized that I have to go off topic a lot to talk about how each type of differential changes the way the car drives. As a result, I thought I'd write a separate post to go into more detail before I post the comparison to keep it more focused on the cars and avoid veering off topic too much. By saying "Limited Slip Differentials" in the title, I am including torque vectoring diffs because, although current conventional terminology treats them differently, a torque vectoring differential is, in essence, a very sophisticated limited slip diff (LSD) that can be manipulated to actively help the car handle better. And while none of the cars in the comparison use open (without help from the brakes) or non-gear mechanical LSD’s, I’ll briefly discuss them so that the post is more inclusive. I’ll only focus on using power to help the...







