German tuning house ABT Sportsline believes that the new Audi S7 Sportback can do with some polishing up on both the styling and performance departments.
The most capable model of the A7 series, which was revealed last fall, is powered by a new 4.0-liter twin-turbocharged TFSI V8 engine that generates 414hp (420PS) and 550 Nm (405.7 lb-ft).
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