Like the carbon-fiber "Monocage II," the new engine will provide the basis for every McLaren model over the next few years. All cars will share the engine, with tuning varying for each variant. It's a cost-effective way to provide some variety to the automaker's lineup. For McLaren's second round of cars (or third if you count the F1), expect more models to adopt a V8-based hybrid system. Currently, only the million-dollar P1 makes use of hybrid components.
Along with some brief info on the new engine, McLaren revealed some performance metrics on what we assume is the new car. Frankly, the numbers are astounding. Zero to 200 km/h (124 mph) takes 7.8 seconds, a shorter time than it takes many cars to reach 60 mph. The new car will blast through the standing quarter mile 10.3 seconds. While 0-60 times aren't the best measure of performance, it does provide a good basis for comparison. McLaren also promises improved throttle response with better power and torque delivery.
No word on who will be manufacturing the engine and engine components for the new V8, dubbed the M840T. The current engine, the M838T, is manufactured by Ricardo and uses Mitsubishi turbochargers, though not the one from the Lancer Evolution. McLaren recently announced some new technical partnerships, including one with BMW. It's not clear if the German automaker has had any input on this new engine.