After revealing the new-generation hybrid last month, Toyota has released additional details about the 2016 Prius including its exact body dimensions and improved powertrain.
For starters, it measures 4,540mm long, 1,760mm wide and 1,470mm tall. This confirms Toyota's previous statement that the 2016 Prius is now 60mm longer, 15mm wider and 20mm lower than the outgoing model. The 2,700mm wheelbase however was retained.
Over to its powertrain, the 1.8-liter VVT-i inline-four engine now has a 40% thermal efficiency, nearly on par with their new diesel engine, the GD series. This was made possible after the automaker installed a dual cooling system in the Prius. When warming up the engine, the system cuts flow of coolant to achieve a faster working temperature. It also has low viscosity oil which reduces friction between the moving parts.
It also has new piston and air intake port designs that according to Toyota, generate better tumble swirl inside the cylinder. In addition, exhaust gas recirculation volume was increased which makes for a better combustion performance. Power-wise, the engine still produces 99 PS along with 142 Nm.
The 73 PS electric motor and transaxle have been redesigned too. It is now lighter and more compact which allows for a greater power-to-weight ratio according to Toyota. Mechanical power losses has been reduced by 20% while a new multi-axle designed allowed for a smaller construction.
It gets a new nickel-metal hydride (NiMH) hybrid battery which has been optimized for urban driving as claimed by Toyota. It is now stored beneath the rear seats, enabling larger trunk space which is now rated at 502 liters.
Toyota expects that the 2016 Prius will be able to achieve an 18% increase in fuel efficiency thanks to its new lightweight design and components.