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How much power has this V10 BMW M5 lost?

The team puts their V10 BMW M5 Touring on the dyno to see how much power it still produces after many years on the road. High ...
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How much power has this V10 M5 lost?

After 15 years on the road, it's time to find out how much horsepower our BMW M5 Touring has retained. Equipped with a legendary V10 engine, the car hits the dyno for a real-world test of aging ...