2020 Supra Destroys Quoted Power Figures on the Dyno

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The new Supra follows in the Mark IV’s footsteps: It’s way faster, and has way more potential than Toyota claims.

The 2020 Toyota Supra might be beautiful to some, ugly to others, but stating its short on power or performance is not an argument anybody will be making. The end all be all of any horsepower debates starts and finishes on the dyno. Everybody likes to talk, but numbers never lie. When the Mark IV Supra was released, boasting its new 2JZ-GTE inline-six turbo powered engine, it supposedly made 280 HP. Dyno tests later showed that this was closer to 320 HP and Toyota was totally in on it. Japanese auto makers all unanimously agreed to not release any engines with a figure of 300 HP or more, so Toyota thought 280 was a nice sounding number and they ran with it. What better way to grace the spirit of the old Supra by doing that exact thing again and sandbagging the power level by a couple dozen?

The new Supra supposedly makes 335 HP and 365 ft/lbs of torque from the factory from its BMW-sourced B58 engine. If you know nothing about the B58, its a hell of a motor, improving off of the already legendary-status the BMW N5x engines had established a generation before it. Two of these improvements the B58 made were a closed deck cylinder block design, which is able to hold higher pressures and more power, as well as an air-to-liquid intercooler, like its bigger brother the S55 (featured in the F8X M3/M4). The B58 is a true performance motor and its been known in the BMW community to make an easy 450 WHP with a mod or two. So what will the new Supra’s Toyota-tuned B58 be able to pull off? Let’s see what Car and Driver managed to get as far as results.


To make a long story short, it destroys its crank figures by a lot more than we expected. 339 WHP at 4,760 RPM and 427 WTQ at 2,190 RPM is far from the stock rated numbers. That’s around another 50-70 crank horsepower, bringing the stock crank HP to around 400, a good old trick, just like the Mark IV. Where the B58 really shines is in fast and strong torque delivery low in the power band, 427 WTQ is just about 150 more ft/lbs than advertised. I don’t know about you guys, but if a new car that I was going to buy anyway suddenly had 25% more power because the manufactured lied about how fast it was, I would smile all the way home from the dealership.

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Daud Gonzalez is a lifelong car enthusiast, and automotive writer with a specialty in modified and race-ready rides. Gonzalez is a regular contributor to the Internet Brands Auto Group websites, including Corvette Forum, 6SpeedOnline, and Honda-tech, among others.

He spends most of his time modifying his cars, and ruining them in the process. He is the owner of a track build BMW 335i, a semi-off road spec 1981 Toyota Hilux, a drift-ready 1990 Nissan 240sx and a 1990 BMW K75 motorcycle.

Most of his free-time is dedicated to making sure his vehicles survive to see the next day. You are likely to catch him at one of Southern California's race tracks on the weekends.

Daud can be reached at [email protected], and followed on his Instagram account.

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