How Much Horsepower Do You Think An E-Class AMG Makes After 400,000 Miles?


Like fine wine, these things just seem to get better with age.

Entropy is the law that dictates the direction time flows in our universe, and following its iron-gripped pull in the forward trajectory, it’s safe to expect that it would have some sort of effect on engines as well as things like temperature. Generally it does. Wear, tear, and all those little things that Engineering Explained guy told us not to do takes a toll on an engine's internal components and as system health begins to degrade, power output drops.

But like aging in general, the side effects can be staved off for some time with ample care and by keeping an eye on the problems that arise, which is exactly how this 2003 Mercedes E55 AMG was looked after. Alex Palmeri from YouTube channel LegitStreetCars decided that he wanted to see how well this AMG held up to the test of time.

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With 402,000 miles on the clock, it’s well past its golden years and is holding on for dear life. Or at least that’s what we thought until Palmeri strapped it to a dyno to extract as power rating. On paper, this E55 AMG made 469 horsepower and 516 lb-ft of torque at the crank when new, but like a fine wine, it seems to have gotten better with age. After giving it a go, this AMG put down maximum outputs of 366 horsepower and 449 lb-ft of torque at the wheels over three runs. Convert that to crank horsepower using things called formulas and math and you get 441 horsepower and 547 lb-ft of torque at the crank, more torque than when the car was stock. If that isn't enough encouragement for you to look after your pride and joy, we don't know what is.

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