Bulgarian interior cabin specialist Vilner is introducing its latest projects based on the Tramontana XTR and Rimac Concept One.

Bulgarian interior cabin specialist Vilner is introducing its latest projects based on the Tramontana XTR and Rimac Concept One.

Vilner brought two very different cars to this month's Salon Privé Concours d'Elégance as the Tramontana XTR and the Rimac Concept One have virtually nothing in common. Nevertheless, both of them received a new look inside the cabin, with the XTR getting a theme that mimics the exterior. Its two seats now come wrapped in black, white and light brown leather combined with Alcantara.

As for the all-electric Concept One, this one features a brown leather finish mixed up with black Alcantara and blue stitching while some of the bits and pieces on the dashboard and steering wheel now have a polished carbon fiber composite finish.

There aren't any mechanical changes, so the Tramontana XTR has the same Mercedes-Benz-sourced bi-turbo 5.5-liter V12 engine with 888 bhp (662 kW) and 722 lb-ft (980 Nm) of torque whereas the Rimac Concept One – still a concept - uses four electric motors good enough for 1,073 bhp (800 kW) and a mind-blowing 3,800 Nm (2,802 lb-ft).

In terms of performance, the XTR needs 3.6 seconds until 62 mph (100 km/h) and tops out at 214 mph (344 km/h) while the Concept One does the sprint in 2.8 seconds and can hit a maximum speed of 190 mph (305 km/h), at least on paper.

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