Real acceleration numbers for 812 superfast

With the wheelspin and obvious power in this vid, also seeing it was made during the night, very likely the air was cool and dense in oxygen, which always makes more horsepower. And yes, fuel in the US leaves a lot to be desired and could very well result in ECU pulling timing and thus power. Max US gasoline AKI is 93, with many areas limited to 91. Comparatively, it is EASY to find 95 AKI in Germany for example. More octane and cool air will definitely result in max power.

 

The enclosed article "Why zero to 60 mph performance is overrated and in the real world, those times don't apply" has some answers to your question…..

 

Top Gear magazine acceleration times below using timing gear. Left side column is Aston DBS Superlegera and right side is 812.

 

Image Unavailable, Please Login Image Unavailable, Please Login

 

Wow those times are really quick for the 812. Wonder how much the difference with the DBS is due to the transmission vs the 74 hp. Ive driven the previous gen Vanquish with the 6 speed auto and the Vanquish S with the 8 speed auto. They were far slower than the 812 dual clutch.

 

US octane is calculated completely differently from European octane. Look it up.

Why is 1/10 second and 7 mph such a big deal in the quarter? Lots of factors can explain that, including just driver input.

 

NSDT, that's why I quoted AKI, which is R+M/2 method. And even when you buy gasoline advertised as "100 RON" at the pump in Europe, it is usually around 95 AKI.

 

It was filmed on the street and could have been downhill.

 

I don't think 0-60 mph is irrelevant at all for the street. Launching a car is very fun if the traction is there and launch control is easy to execute. 0-60 mph in sub 3 seconds feels great. It's even more fun when the acceleration doesn't drop off above 100 mph (although this can get scary).

 

Spot on.

Shell V-Power 99/100 etc. are usually 94-95 on the Anti Knock index. Our 95 RON is 90-91 depending on brand etc.

I have a friend who works as a chemical engineer for one of the large refinaries in the US, and he has some interesting tales - and he considers US gasoline among the worst in the western world.

The problem with the AKI is that there's basically no rules regarding blends. This meANs you can refine a cheaper gasoline that is 91 AKI, which is less knock resistant than say a quality 87 AKI fuel. If the RON is 101, but the MON is 81, that will be perfectly legal to sell as 91 AKI. This fuel will also work fine in your 91 rated runabout soccermom bus or dads Tahoe. Unfortunately, it is utter useless when used in an engine that is pushed. This is why some have seen an actual gain switching from normal pump fuel to something like VP100 unleaded. Most notably here with 458Trofeo(Carlo) whom saw a significant change over the usual California dog water they call fuel.

What is even more bizarre are the rules regarding US E85. By law it can be as low as E70.

In Europe a RON 95 has to have a somewhat high MON number as to work as advertised. The benefit of this is that during severe duty use, it has a pretty good knock resistance.

When I have had to use race gas, I have always focused solely on the MON as the MON is much more indicative of a quality fuel with a high knock resistance during high stress loads.