Powering the Elise Cup 250 is the same 1.8-litre supercharged four-cylinder petrol engine, though power is bumped up to 181kW (up from 162kW), while torque remains unchanged at 250Nm.
Drive is sent to the rear wheels via a six-speed manual transmission.
Thanks to the boost, the new model can go from 0-60mph (0-96km/h) in just 3.9 seconds - down from 4.1 - though 0-100km/h takes slightly longer at 4.3 seconds. Lotus claims a top speed of 154mph (248km/h) for its latest track weapon.
Weighing just 917kg (kerb), the Elise Cup 250 is only 13kg heavier than the Elise Sport 220, and boasts a power-to-weight ratio of 283hp (211kW) per tonne.
Headlining additions to the racier version include an array of aerodynamic enhancements - such as a new rear wing, front splitter, side skirts and a rear diffuser - which help to deliver 125kg of downforce when travelling at 140mph (225km/h).
The Elise Cup 250's featherweight mass has been achieved through the adoption of lightweight materials like carbon-fibre, titanium and aluminium.
Filling the arches are ultra-lightweight forged alloy wheels, wrapped in Yokohama Advan A048 LTS tyres - measuring 225/45 ZR17 at the rear and 195/50 ZR16 at the front.
Inside, the Elise 250 Cup picks up carbon-fibre race seats trimmed with Alcantara, along with exposed carbon-fibre and Alcantara trim elements throughout the simplistic interior.
Buyers wanting a little more from their road-going race car can choose from a lengthy options list, which includes a leather trim pack, tartan trim pack, floor mats, coloured interior trims, contrasting exterior paints, air-conditioning, bluetooth, sound insulation, a carbon-fibre aero pack - the latter adding carbon versions of the front splitter, rear wing and side skirts - and a lightweight titanium exhaust system.
These options can cost anywhere between 100 and 4000 pounds ($173-$6935), on top of the standard car's UK list price of 47,400 pounds ($82,182).
Lotus Australia has confirmed with CarAdvice that the Elise Cup 250 is available to order in Australia, with two already sold in Sydney and another in stock in Brisbane.