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Video: Boosted Audi RS3 vs. Mercedes-AMG A45 S

A non-stock RS3 liftback meets a very similar AMG A45 S hatchback on a drag strip. Both pack class-leading engines, but which one is faster? Let us find out!

The Audi approached the start line with its usual 2.5-liter five-cylinder engine boosted from 400 PS (394 hp / 294 kW) to 537 PS (530 hp / 395 kW).

The Mercedes hot hatch had an initial advantage with its eight cylinders, four liters of displacement and 421 PS (415 hp / 310 kW) of power at the crank. However, applying a Stage 2 upgrade only resulted in around 506 PS (500 hp / 373 kW). In other words, the outsider Audi has pulled ahead of its rival here.

Will the Sportback be able utilize its slim advantage in the quarter-mile race? Watch the video from 9:40 and see for yourself!