Who doesn’t like dyno tests? Miserable people, that’s who, or perhaps low-down dirty miscreants who have shoved Iron Dukes into their GTOs. The rest of us always enjoy the cold, hard truth that a dyno wrings out of cars, and today we’d like to share this comparison of a 2018 BMW M3 with the Competition Package and a…

The 755-horsepower 2019 Chevrolet Corvette ZR1 is great for the dyno. It has a monstrous factory power rating, but losses in the drivetrain mean that number isn’t what ultimately goes to the wheels. The dyno helps find out how big that power loss is, but it can also make a person lose control of their limb.

Big, beautiful all-terrain tires are key component of any off-road build, as they add ground clearance and traction. Plus, they look awesome. But they’re also going to cost you some performance, and you can see exactly how much in this dyno test.

The E30 BMW 3 Series is probably the go-to Craigslist car for people looking for something fun that’s also easy to work on and easy to modify. This also makes it difficult to find a car that’s still stock, but if you did, here’s how much power you can expect it to make.

A couple of days ago, this 2019 Corvette ZR1 was delivered to its new owner. It is allegedly VIN 4, and the first manual ZR1 delivered. That’s the kind of thing that Corvette collectors care about, and it’s good for bragging rights, but not much else. More interesting for the rest of us, however, was that the new…

Earlier today, we ran a Countersteer roundup where one unfortunate reader accidentally let a shop towel get sucked into a turbo during a dyno pull. It was bad, catastrophically so. And then I got to see such a thing happen in action.

Most automotive enthusiasts know that cars tend to lose a bit of power with age and use, as wear and tear can take its toll on a car’s internals. On this episode of LegitStreetCars on YouTube, the host Alex shows just what kind of horsepower numbers his beater AMG’s hand-built engine can put down after almost twenty…

Maybe I’m ignorant for having this mindset, but I always thought you could go to a dyno to figure out how much power your car makes and that was the number you could proudly tape to your fridge. Jason Fenske of Engineering Explained has a different take.

Depreciation hits used Mercedes AMGs like an anvil coming down on Wile E. Coyote. So you’ve got to imagine that once an AMG’s odometer his a ridiculous 402,292 miles it’d be totally worthless, right? You can decide for yourself after seeing how much power this well-loved 2003 Mercedes E55 AMG is still making.

There have been a ton of numbers flying around the 2017 Honda Civic Type R lately—its specs and power ratings compared to other sport compacts in the market, its crazy-high dealership prices doubling MSRP and the like. But if you want some real numbers, here’s the power the Type R makes on the dyno.

The Alfa Romeo Giulia Quadrifoglio is a perfect car in my dreams. In this perfect dream world, Alfa claims the Quadrifoglio boasts 505 horsepower from its twin-turbo V6 and max torque of 443 lb-ft out of the box. But how does it hold up in the real world?

Why buy a Chevy Spark when you could buy this used Dodge Viper for less? Usually, it’s because “cheap supercar” really means “immediate and immense repair bills.” But if you get lucky, know what you’re doing and where to scrounge up parts, you might be able to squeeze some decent power out of a fifteen-year-old V10…

A car’s horsepower rating is generally measured at the wheels or engine crank. Automakers advertise the latter number because it’s higher, but some cars actually end up putting down more power than the manufacturers claim. And that’s a corporate lie we might not complain about.

We’re all thankful that the Ford Focus RS, an overpowered all-wheel drive hot hatchback with “drift mode,” even exists. But I know I’m not the only one who’s wondering how close its actual wheel horsepower is to the factory claim. And while we’re on the subject—how much power can you make with modifications? These…

Josh Clymer has been driving his 2005 Acura TSX a lot. In fact, he says he’s up to 505,248 miles now on the original drivetrain. To celebrate a half-million, he took the car to get compression and dyno tested. That gives us a good idea of how healthy the engine really is.

The BMW M3 is a (virtually) universally appreciated car. Pretty, practical, fun to drive—there’s not much to dislike. If you want one today, the E36 body style of the 1990s tends to be the cheapest. But, the question becomes, how much “M3” is still left in a decent example after all that time?

More power equals more better, but sometimes trying to eke out those last couple horsepower from your tuner can result in enormous fiery explosions. Case in point: this ill-fated dyno pull video.

The in-house competition at Chevrolet between the Camaro SS and the Corvette C7 just heated up with a recent dyno test of the SS putting more horsepower down at the rear wheels over its not-so-superior sibling.