After qualifying, the top 6 positions on the starting grid were held exclusively by the hybrids (4 Audis, 2 Toyotas).
At the end of the event, the 2 Toyotas were gone (1 taken out by a Ferrari; one mechanical failure following contact with Nissan's efficient experimental Deltawing car), and the Audi hybrid won.
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While both the Audi and Toyota employ hybrid powertrains, a first for endurance prototypes, each go about it in very different ways. The TS030 makes use of a naturally aspirated 3.4-liter V8 while the R18 e-tron Quattro uses a turbocharged diesel V6. Audi's hybrid system powers the front wheels, hence the Quattro name, while Toyota's [...] will drive the rear wheels.
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Toyota TS030 and Audi R18 E-Tron Quattro pose for the camera
Both cars used flywheel systems to capture energy via regenerative braking & release it back to the drivetrain for added power.