The CSR has two engine options based on the same Duratec block, though modifications and power output differ.

The CSR is the subject of numerous improvements over previous models (see below), though it still retains the main aesthetics of Caterhams.

While slightly heavier than other Caterhams the CSR still upholds Colin Chapman's philosophy of "add lightness.

[6][7] The CSR has excellent low-end acceleration because of its high power-to-weight ratio of 410 bhp (310 kW) per ton (260 model).

[8]For comparison the Porsche 997 Turbo, which has AWD and weighs over twice as much as the CSR, has a power-to-weight ratio of only 269 bhp (201 kW) per ton, but has a 0–60 mph (0–97 km/h) time of 3.4 seconds.

[3] The CSR, as with all Caterhams, has worse performance at higher speeds with respect to both acceleration and handling because of the poor aerodynamics.

With such strong wind resistance, it requires much more power to overcome that force and increase top speed.

Lift reduces contact force on the tires, causing the car to feel "loose" and not handle as well.

The front suspension has double wishbone, fully adjustable, inboard springs and dampers, improving aerodynamics.

The rear suspension is also upgraded to a double wishbone, fully independent system, replacing the De Dion tube design.

Caterhams have very poor aerodynamics due to the blunt windscreen, open-wheel design, and open cockpit.

Also, the new front suspension scheme reduces turbulence and drag formerly caused by the spring and damper units.

On previous Caterhams, the air from the radiator caused turbulence by knocking against the engine and other parts on the underside.

A plastic panel behind the radiator now directs air straight out through the vent, creating down force and reducing turbulence.

As a production vehicle, the CSR is illegal because of lack of safety features and failure to meet emissions standards.

Chassis may be purchased from Superformance, Caterham's official distributor in the United States, and their network of dealerships nationwide.

[13] While many previous models of Caterhams are sold as kit cars to customers in the US, the complexity of the CSR makes this much more difficult, and is discouraged by dealers.