When you're building cars that start at $2.6 million, you wipe your shoes before stepping inside. Here, 20 Bugatti engineers spend six months on each Chiron.

The heart of the Chiron is the W16 engine, which at full speed empties the 26-gallon tank in eight minutes.

Bugatti expects the Chiron to be the world's fastest car, so it uses the world's most powerful dynamometer. Oh, and it pumps the excess power the thing generates into the local grid.

It takes 500 hours to laminate all the carbon fiber for a single car.

And a full three days to fit in all the interior bits.

After two days of polishing, a Bugatti worker inspects the car in a room specially lit to reveal any blemishes.

Wrapped in transparent, plastic foil to prevent damage from pebbles, the Chiron hits the road for a 186-mile test drive, during which it'll hit 155 mph.