420R

The Caterham 420R (also known as Caterham Seven 420R) is a lightweight, track-focused variant of the legendary Lotus Seven-derived roadster produced by British manufacturer Caterham Cars. The 420R features a Ford-sourced 2.0-liter Duratec four-cylinder engine producing approximately 210 horsepower, delivering power to the rear wheels through a five-speed manual gearbox with a lightweight flywheel. Weighing just 585 kilograms (1,289 pounds), the 420R achieves an extraordinary power-to-weight ratio of 375 horsepower per tonne, enabling 0-60 mph acceleration in 3.8 seconds despite relatively modest absolute power figures.

The R-specification package includes track-oriented equipment such as a limited-slip differential, uprated suspension with stiffer springs and dampers, race harnesses, enhanced brake master cylinder for improved pedal feel, and a shift light for optimal gear changes. The 420R represents the core philosophy of Seven ownership: maximum driving engagement through minimal weight rather than maximum power. With sprint gearing limiting top speed to approximately 136 mph, the 420R prioritizes acceleration, handling, and driver involvement over straight-line velocity. The open-wheel, minimalist design with cycle fenders and exposed mechanicals provides an unfiltered driving experience reminiscent of 1960s racing sports cars, making it popular for track days, hill climbs, and spirited road driving among enthusiasts who value pure mechanical feedback and lightweight dynamics above modern comfort and refinement.