Is Toyota actually working on a Supra with BMW M3 power?

Toyota revived the Supra in 2019 after a 17-year hiatus and opted to use two BMW-sourced engines. The Supra is available with a 2.0-liter four-cylinder with up to 255 horsepower and a 3.0-liter inline-six rated at up to 382 horsepower, both shared with a big variety of BMW models, including the 3 and 4 Series, the X5, and the Z4.

The top 382-horsepower engine, shared with M-badged Bimmers, was recently added for the 2021 model year, but word has it that Toyota wants an even more powerful mill. The folks over at Statesidesupercar released a video showing a Supra being driven hard on the Nurburgring, suggesting that this mule might feature the beefed-up inline-six engine from the newly launched BMW M3 and M4.

This Toyota Supra Mule Could Be Spitting the Tune of The BMW M3's S58 Inline-Six
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The test car looks identical to the standard Supra, so there are no visual hints that Toyota is testing a higher performance model.

This leaves the exhaust note as the only factor that could make a difference. We’ve already seen the BMW M4 charge on the ’Ring and we know that the S58 inline-six is very noisy compared to the regular B58 engine it is based on.

While this Supra sounds pretty mean, the exhaust note isn’t as aggressive as the new M3 and M4. What’s more, Supra owners also argue that the test car is most likely fitted with the B85 rather than the S58 mill. But this doesn’t necessarily mean that Toyota won’t build an S58-powered Supra in the future.

What makes the S58 engine special?

This Toyota Supra Mule Could Be Spitting the Tune of The BMW M3's S58 Inline-Six
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The S58 is a heavily upgraded version of the B58, developed specifically for high-performance BMWs.

The S58, a replacement for the old S55, debuted in 2019 in the X3 M and X4 M crossovers.

A more powerful version debuted in the Competition variants of the SUVs the same year. Come 2020 and the S58 found its way into the M3 and M4, while the beefed-up variant pumps the extra oomph into the Competition models.

How powerful is the S58? Well, the base version cranks out 473 horsepower and 405 pound-feet of torque. That’s enough to make the M3 and M4 the most powerful ever except for the track-ready M4 GTS. But the beefed-up version delivers a solid 503 horsepower and 479 pound-feet of twist, more than any other M3 or M4 built to date, regardless of specification or limited-edition status.

This Toyota Supra Mule Could Be Spitting the Tune of The BMW M3's S58 Inline-Six
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Should Toyota use the M3’s inline-six engine in the Supra, we will end up with a range-topping model that’s notably more powerful than the 2021 version. Even if its uses the base S58, it will deliver an extra 91 horsepower over the existing six-cylinder Supra. A Japanese coupe with M3 Competition power will mean an extra 121 horses and a tremendous amount of output for the Supra, more than any other production model to date. It will also make it the most powerful Toyota ever produced.

This Toyota Supra Mule Could Be Spitting the Tune of The BMW M3's S58 Inline-Six
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On the other hand, it will also be notably more expensive. The four-cylinder Supra starts from $42,990 and the inline-six model retails from $50,990. This means that the S58-fitted Supra will fetch in excess of $65,000, but it could also hit the $70,000 mark depending on all of the aero extras it might get.

For now, there’s no confirmation that an S58 Supra is underway, but it could happen.

Ciprian Florea
Senior Editor and Supercar Expert - ciprian@topspeed.com
Ciprian's passion for everything with four wheels (and more) started back when he was just a little boy, and the Lamborghini Countach was still the coolest car poster you could hang on your wall. Ciprian's career as a journalist began long before earning a Bachelor's degree, but it was only after graduating that his love for cars became a profession.  Read More
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