If it seems as though the McLaren 600LT – until now the most potent of McLaren’s Sports Series models – was released just over a year ago, that’s because it was, and now we have an even more track-focused road-going model, the 620R.

Dubbed by the supercar maker from Woking as a road-legal version of its 570S GT4 racer, the 620R’s outputs are hinted in its name – 620 PS is produced at 7,000 rpm and 620 Nm of torque is made at 3,500 rpm courtesy of its M838TE 3,799 cc biturbo V8 engine, sent to the rear wheels via a seven-speed seamless-shift gearbox, otherwise known as a dual-clutch transmission.

The racer-for-the-road theme continues with its coilover dampers which are manually adjustable for compression and rebound within 32 clicks, and these are also 6 kg lighter than the items on the regular Sports Series models, says McLaren. The aluminium wishbones and uprights are fitted with stiffer springs and anti-roll bars compared to the regular Sports Series models, and rubber top mounts are exchanged for stainless steel items for further improved steering precision and feedback.

Brakes are carbon-ceramic discs measuring 390 mm in front and 380 mm at the rear, with forged aluminium calipers at all corners. Tyres are Pirelli P Zero Trofeo R as standard, measuring 225/35/R19 in front and 285/35/R20 at the back; the customer can optionally add Pirelli slick tyres for track running. McLaren also says that the 620R has been engineered to run with these slicks without further mechanical adjustment.

Aerodynamics is paid additional attention on the 620R, which adopts the adjustable carbon-fibre rear wing directly from the 570S GT4 race car. Adjustable within three positions, the rear wing contributes to total downforce of 185 kg overall when set to its most aggressive position.

In front, the front bumper, splitter and bonnet have been redesigned; the splitter retains its aero blades and cut-out while the carbon-fibre bonnet employs twin ‘nostrils’ to aid downforce and clean up airflow over the top of the car. Dive planes in front also contribute up to 3kg of downforce as part of the 65 kg total from the overall frontal aero package, says McLaren.

Less is more in track car philosophy, and as such the 620R does without conventional comforts such as floor carpeting and a glovebox. Also removed are air-conditioning, navigation and audio, although these can be added back if the customer so chooses; a lightweight Bowers & Wilkins is also available as a cost option.

Standard interior equipment includes carbon-fibre racing seats with six-point racing harnesses, a red central marker on the steering wheel and door pull straps, while carbon-fibre is used for the extended gearshift paddles, steering wheel spokes and centre console in the 620R.

Also aiding track use as standard is the McLaren Track Telemetry (MTT) system, displayed on the centrally mounted seven-inch touchscreen. If the optional MSO Roof Scoop Upgrade Pack is specified, the MTT can be upgraded to include a three-camera system.

Limited to a run of 350 units, the 620R features an identification plaque on its centre console, and it can be customised with the full array of McLaren Special Operations options such as specific colours, carbon-fibre packs, exterior kits including a titanium exhaust and interior upgrades and personalisation. All will be built at the McLaren Production Centre in Woking, Surrey, and prices start from £250,000 (RM1,368,422) in the United Kingdom.