Except for the Dodge Demon, which does the 1/4 in 9.65
That's also why I am skeptical of this Tesla running an 8 second pass in stock trim. Is there a video of the pass?
Most of the 8 second cars I've seen are running slicks or drag radials, and usually weigh a lot less.
I'd be curious to see how Tesla managed to make a car that probably weighs over 4000 pounds have enough traction for those numbers using regular tires. Even with all wheel drive, 8 second Nissan GTRs usually have to resort to slicks.
Can you provide links? I seriously doubt you can get anything into the 8s with only $10k.
However, I'm assuming you are interested in brand new production cars. The cars I listed above are all old and do not compare to the Tesla in anything other than drag racing. If you're interested, let me know and I can go into a more detailed breakdown of the last car I tuned (LSx swapped Mustang).
As for new cars, it depends on how much work you're willing to do yourself vs paying a shop.
Here's a link to a newer 5.0 Mustang with a completely stock engine and a ~$8500 twin turbo kit. He does have other supporting mods (tires, suspension, torque converter) that likely put him over the $10k mark, but you can also save a few thousand on the turbo kit by piecing it together yourself.
"He estimates the car makes over 900 horsepower at the tire, but what really matters is the stock Coyote engine paired with an off-the-shelf Hellion turbo kit added up to an 8.6-second e.t. at over 150 mph."
https://www.svtperformance.com/2015/04/13/feature-quickest-s...
The fastest 1/4 mile production cars are supercars such as the Veyron and 918, which are at or just under a 10seconds.
Remember, an increase from 20->18 seconds is roughly a 10% increase in acceleration; 10->8 is roughly 20% increase over an already ludicrously fast million-dollar supercar.
It's frankly ridiculously fast.