When it came time to work on the new McLaren 750S, the company's engineers didn't want to spoil a good thing. After all, the 750S' predecessor, the 720S, could already hang with all but the most rarefied and expensive machines on the track while being relatively comfortable and easy to live with on a day-to-day basis. Don't fix what ain't broke, and all that. But the iterative changes that get us from 720 to 750 are nevertheless impressive.
At first glance, the new car doesn't look all that much different than the old one. But there's a lot going on underneath that familiar bodywork. More power, less weight, bigger brakes and parts borrowed from both the McLaren Senna and 765LT — both track-focused cars based on the 720S — are among the 750S' highlights. Some significant quality-of-life updates make the new car better to drive both on the street and on a track.
The 750S certainly looks familiar on the outside, but McLaren says about 30% of the car is new or has been revised. Even that familiar design has been changed ever so slightly, though that's to do with improvements to aero rather than simply trying to make the new car look different from the old one.
The goal of these changes isn't a dramatically different car but rather one that hones what made the 720S so good while improving on areas where it was lacking. We spent some time outside of Las Vegas both on the street and at the infield track at Las Vegas Motor Speedway to see how the new 750S coupe and drop-top 750S Spider shake out.