A new dyno test reveals excessive amounts of power from the 2021 Toyota Supra

Just a few weeks ago, Toyota announced that the 2021 Toyota Supra would be even more powerful (and faster) than the 2020 Supra. Then a week or so later, it did its best to justify sticking it to the folks that bought a 2020 model. Now, however, we’re finding out that the 2021 Supra (the inline-six model, of course) really puts down 388 horsepower at the wheels – 11 ponies more than Toyota’s newly advertised 377 horsepower figure. So, what does this really mean? Well, the true power of the 2021 Toyota Supra could be approaching the 450 horsepower mark at the crank, and that’s a huge bump in power.

The 2021 Toyota Supra Really Delivers Close to 450 HP

Last year there were two independent dyno tests ran on the 2020 Toyota Supra. In the first test, we found that the 2020 model put down some 339 horsepower at the wheels (4 ponies more than it should have at the crank) and the second test came out with similar results at 332 horsepower at the wheels.

Now, Car and Driver is back at it with a 2021 model, and guess what? It sings that same song as the 2020 model, albeit to much higher levels.

In C&D’s dyno run, the 2021 Toyota Supra (video embedded above) put down an impressive 388 horsepower at the wheels, 11 horsepower more than advertised at the crank.

If you factor in a parasitic loss from the transmission and driveline, of about 15-percent, the 2021 Toyota Supra actually pumps out somewhere in the neighborhood of 450 horsepower at the crank.

That means that BMW’s B58 – the engine found in the Supra – is capable of hitting S55 M-Division numbers.

The 2021 Toyota Supra Is Actually Good For Nearly 450 Horsepower
- image 906656

To make the Supra more powerful for 2021, Toyota adding a new dual-branch exhaust manifold and redesigned the pistons to achieve a different compression ratio (10.2:1 as opposed to 11:1). So, in essence, Toyota has managed to make the Supra just as powerful as the BMW Z4 it’s based on, and that’s good news for anyone who didn’t buy a 2021 model.

The 2021 Toyota Supra Is Actually Good For Nearly 450 Horsepower
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2021 Toyota Supra 3.0 vs 2020 Toyota Supra 3.0
2020 GR Supra 3.0 2021 GR Supra 3.0
Engine 3.0-liter inline six-cylinder with twin-scroll single turbo 3.0-liter inline six-cylinder with twin-scroll single turbo
Horsepower 335 HP @ 5,000 - 6,500 RPM 383 HP @ 5,800 - 6,500 RPM
Torque 365 LB-FT @ 1,600 - 4,500 RPM 368 LB-FT @ 1,800 - 5,000 RPM
Transmission ZF 8-speed automatic ZF 8-speed automatic
Weight 3,396 lbs 3,400 lbs
0 - 60 mph 4.1 seconds 3.9 seconds
Robert Moore
Editor-in-Chief and Automotive Expert - robert@topsped.com
Robert has been an auto enthusiast his entire life. He started working cars at a young age, learning the basics from his father in the home garage on the weekends. As time went on, Robert became more and more interested in cars and convinced his father to teach him how to drive when he was just 13 years old. Robert continued working on cars in his free time and learned as much as he could about engines, transmissions, and car electrical systems, something that only fed his curiosity more and eventually led him to earn a bachelors degree in automotive technology with a primary focus on engine performance and transmission rebuilding.  Read More
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