Ferrari LaFerrari vs McLaren P1 vs Porsche 918 Spyder
Top Gear sizes up three of the most anticipated hypercars of 2013...
Posted: 02 May 2013
The 918's hybrid system is more complicated. For a start it has two e-motors, one at the front as well as one at the back. Total power of these is 270bhp in short bursts, more than an early 911 Turbo. So the car goes pretty hard in its plug-in electric-only mode, and will go further than the McLaren too - at the expense of having a heavier 135kg battery. But the availability of so much electric power when the V8 is also running means that there's scope for active front-rear torque split, and extra doses of regenerative braking for greater efficiency. To harvest that regeneration, the 918 has a by-wire brake system that apportions braking effort between the motors and the friction discs according to the power the battery can accept. For instance, if the battery is fully charged, more braking effort falls to the discs. All-wheel drive front-rear torque vectoring, brake-by-wire - this is a complicated chassis. And that's before you add the fact it has four-wheel steering too, like they just introduced on the 911 GT3.