The latest Mercedes-AMG C63 has one of the most impressive engines in the world. It makes 234.5 horsepower per liter, a figure unmatched by any mass-production car on the market. It's half the size of the engine it replaced but had the same output.

Vuk Manufaktur has spent two years making the C63 S that Mercedes-AMG should have built. The standard plug-in hybrid powertrain may have more power, but it cannot match the V8’s sound. There’s no word on whether the Austrian company plans to sell V8 conversions to customers.