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We’ve seen the handsome Infiniti Q60 Concept before, both inside and out, but what we didn’t know was what’s underneath the taut skin. Thankfully, Infiniti has provided just that at the 2015 Detroit Auto Show.

Measuring 4,690 mm long, 1,865 mm wide and 1,370 mm high, the new 2+2 coupé is larger than rivals like the BMW 4 Series, Mercedes-Benz C-Class Coupe and Audi A5, with only the Lexus RC eclipsing it in length by a measly 5 mm. This runs in line with its sibling, the Q50 sedan, which is one of the largest cars in the compact exec segment.

The Q60 Concept looks quite a bit more distinctive than the Q50, with a much bolder front grille, a split front bumper design, Eau Rouge-esque vents behind the front wheels, a cleaner, more elegant rear design and stronger haunches filled by enormous 21-inch wheels. The interior will look familiar to Q50 owners, but lined with more exotic materials like hand-stitched quilted leather upholstery and carbon fibre accents.

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Powering the Q60 is a direct-injected, twin-turbocharged 3.0 litre V6, said to be part of a new family of smaller, lighter, more powerful and more efficient engines. Seeing as Infiniti currently has a powertrain deal with Mercedes-Benz, we wouldn’t bet against the mill being the same 3.0 biturbo V6 currently slotted into the Tristar’s “400” models like the C 400, E 400 and S 400.

The rest of the technology has been lifted from the Q50, like the steer-by-wire Infiniti Direct Adaptive Steering system and the dual-touchscreen Infiniti InTuition infotainment system. The latter can cater to preferences for up to four drivers through the car’s Intelligent Keys, adjusting parameters like the driving position, climate control, audio, navigation and telematics.

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“The Q60 Concept is Infiniti’s vision for a sports coupe,” said Infiniti’s executive design director Alfonso Albaisa. “Design, performance and premium quality – these are what makes a sports coupe stand above the crowd. And these are what you’ll find on the definitive Q60 Concept.”

Infiniti clearly has a production version in its sights – the company has said that it will make a sports coupé with “influences of the Q60 Concept” next year. It has also confirmed that the Q30 hatchback, previewed by a concept in 2013, will go into production later this year.