@Background Pony
 
The main difference is the way the cars are built. F1 cars are built for circuits. Not ovals, definitely not dirt. If you run an RB8 in Richmond dirt, the car wouldn’t make it a single lap. Conversely, you could try to run a WoOSC at Spa Francorchamps, but it would either run out of fuel, or chew up it’s tyres within a few laps at best.
 
Another consideration is gearing. Sprint cars usually top out at 140 on track, and become unstable at 170 in a straight line. Formula one vehicles can achieve speeds as high as 230 mph, when completely trimmed out (however in most racing scenarios, this is unreasonable).

@Bopop4  
HP => KW  
pounds => kg  
inch => cm

@BigMax  
?

@Bopop4  
Why not complaining about all the wrong units?

@Background Pony
 
You got the units switched, 1.39 and 1.77 pounds per horsepower, respectively.  
It’s all good though. : )

*number OF years
 
Dammit.

@Bopop4
 
I’ve been around these machines for a quite a number years, and I was a little skeptical when I read that comment. (Nothing personal, by the way.) The following numbers were obtained by dividing the power over the weight, p/w.
 
A good, well built World of Outlaws Sprint Car puts out 900 horsepower from a 410 cubic inch, naturally aspirated V8 engine, at a max of 8,500 to 9,000 RPM at a minimum car weight rule of 1,250 pounds. That works out to roughly 1.39 horsepower per pound.
 
At the same time, a modern (as of 2013) Formula One car puts out around 800 horsepower from a 153 cubic inch, naturally aspirated V8 engine at a max 18,000 RPM. The minimum car weight is around 1,415 pounds. That works out to around 1.77 horsepower per pound.
 
TL;DR: Although the F1 car has a greater PtW ratio than the Sprint Car, it’s not by a large margin.

@Background Pony
 
Any of them would be good, but AJ in a sprint car with the power to weight ratio of an F1 seems more fitting.

@Background Pony  
Regarding this issue, I found the perfect guy to voice King Sombra: Kimi Raikkonen.

@Bopop4  
Why not Rally Safari, Dakar or Baja 1000?

@Background Pony  
Yeah, and with all motorsports in general.
 
If a good artist drew AJ in a dirt sprint car, now that would be fantastic.

We desperately need more MLP X F1 crossovers. Who’s with me?

@(T_a)  
Look, we all love Google, but those are goggles. :)

@Background Pony  
Nah, it’s a Cooper Climax. I still wouldn’t want to get into a wreck with an F1 car from those days though, no matter what the manufacturer/

Hope that’s not a Lotus or Apple Bloom may lose a sister. Colin Chapman wasn’t much for safety…

@kruppenstein  
Everybody looks sexy ^in googles

she looks so sexy in googles