R400 series is Caterham Motorsport's premier British championship. The R400 is a 220 bhp Cosworth powered dedicated race car with a Quaife six-speed sequential gearbox replacing the standard Caterham unit used in the R300. As with all series above Academy, it runs on Avon CR500 tyres. 2009 Champion Dan Denis, Matt Blyth Racing Superlight R500 The Superlight R500 series is the latest of Caterham Motorsport's Superlight series of RSA Racing cars. Powered by a 2.0-litre Ford Duratec engine producing maximum horsepower (bhp/rpm) of 263 bhp @ 8500rpm and maximum torque (lb.ft/rpm) of 177 lb.ft @ 7200rpm. With a weight of 506 kg (516 kg) and a sequential gearbox, it is capable of 0–60 mph in 2.88 seconds and a power-to-weight ratio of 520 bhp-per-tonne. Advertised top speed 150 mph. The R500 has been made Top Gear car of the year 2008. In another appearance earlier in the series, it placed fifth on the Power Lap board with a 1:17.9. This time beat the €1,100,000 (£899,000/$1,550,000), 1001 hp Bugatti Veyron. Superlight R600 In October 2012 a supercharged model for a race-series above the R300-class was released, including slick tyres and a sequential gearbox. Superlight 620R In September 2013 Caterham made a car called the 620R. It was based on the R500, but was supercharged. This increased the power output to at 7,700 rpm and the torque to at 7,350 rpm. It also reduced the 0– time to 2.79 seconds. It has a power-weight ratio of 568 bhp-per-tonne and a top speed of 155 mph. CSR The CSR chassis comes in two basic trims which mirror those of the S3/SV cars. The 'basic' CSR has a road and touring oriented spec with full windscreen and weather equipment. This is available as the CSR200 (200 bhp) or CSR260 (260 bhp). The CSR Superlight (also 260 bhp) is the current Caterham performance flagship strips away the windscreen, integrated dash and other comfort-oriented components for maximum performance, with specialist 'Dynamic dampers' added to improve its already phenomenal grip. The 'basic' CSR set an unofficial time of 1.17.4 on the BBC Top Gear test track at Dunsfold, placing it ahead of many of the world's most expensive performance cars. Engines: 2.3-litre Ford Duratec tuned by Cosworth (200 bhp or 260 bhp) RS Performance RST-V8 engine The 'Caterham Levante', built by RS Performance Engine Developments Ltd. (RS=Russell Savory), is a mostly-carbon-fibre bodied Caterham, with Kevlar seats, combined