What production car held the top speed record from 2005 to 2007?

The production car that held the top-speed record from 2005 to 2007 was the Bugatti Veyron 16.4.

On 19 April 2005, German inspection officials verified the Veyron at 408.47 km/h (253.81 mph). Its 8.0-liter quad-turbocharged W16 engine produced about 1,001 metric horsepower, making it one of the defining hypercars of the early 21st century.

The Veyron replaced the McLaren F1 as the recognized production-car speed leader. In October 2007, the SSC Ultimate Aero reached 412.22 km/h and took the record. The Koenigsegg CCR is a common mix-up because it briefly surpassed the McLaren F1, but its 2005 run was a single-direction test and is not generally accepted under stricter production-car record rules.

This record concerns road-legal production cars, not racing cars, prototypes, or heavily modified one-off vehicles. The later Veyron Super Sport set a separate record in 2010.