Roughly 18 months after the launch of the 720S Coupe, McLaren has now launched a drop-top version of the same model. The 720S Spider sports plenty of tweaks ranging from frameless doors and new rear spoiler programming, along with wide improvements over the last Super Series roadster, the 650S Spider.
McLaren has ditched the carbon Monocage II that underpins the 720S for the Monocage II S that will be seen in the Spider. The lack of rigidity due to the lack of an overhead spine in the new tub is compensated by the new carbon supports at the tub’s rear.
The usage of carbon saves close to 7kgs in the rollover protection structure of the 720S monikers, which in the 650S were steel supports fitted into the Monocage. Additionally, the new Monocage II S does not need extra strengthening elsewhere, keeping the slim A-pillars and header rail of the 720S.
The new standard carbon fibre roof mechanism on the Spider is electrically controlled instead of hydraulically actuated. The roof can now be lowered in 11 seconds at speeds up to 49kph, which is six seconds faster than the 650S Spider.
The 4.0-litre twin-turbocharged McLaren V8 engine that powers the 720S Spider is unchanged from the Coupé. The mid-mounted engine produces 710hp and 770Nm and given the lightest-in-class weight of the 720S Spider, it results in a power-to-weight ratio of 540PS-per-tonne at the lightest dry weight.