Toyota optimal drive: more power, lower fuel consumption and co2 emissions
- New 1.33-litre Dual VVT-i petrol engine
- New Stop & Start technology
- Revised 1.4 D-4D diesel engine
- World's lowest AWD passenger car CO2 emissions and fuel consumption
- New 6-speed manual transmission
Toyota Optimal Drive showcases a combination of wide-ranging, advanced technologies designed to optimise the balance of performance and driving enjoyment with fuel economy and low emissions. These diverse core technologies focus on three key aspects of powertrain development: the reduction of engine weight, the reduction of unnecessary mechanical losses and the maximisation of combustion efciency.
The Urban Cruiser powertrain line-up features a new 1.33-litre Dual VVT-i petrol engine with Stop & Start technology, a 1.4-litre D-4D diesel engine and a new six-speed manual transmission for both engines. Every powertrain benefts fully from the low friction components, super-lightweight compact design and enhanced combustion efciency inherent in Toyota Optimal Drive.
New 1.33-litre Dual VVT-i petrol engineFeaturing innovative "Stop & Start" technology, the new 1.33-litre petrol engine is equipped with Dual VVT-i (Variable Valve Timing-intelligent) and a remarkably high compression ratio of 11.5:1. It generates 74kW/101 DIN hp and maximum torque of 132 Nm at 3800 rpm, combining excellent dynamic performance with fuel consumption of just 5.5l/100km and CO2 emissions of only 129g/km.
Profting from Toyota's extensive motorsport experience, the unit is exceptionally lightweight and compact, with a small bore and long stroke, resulting in a very high power-to-weight ratio. It features a resin-type cylinder head cover and intake manifold, and the intake channel has been streamlined to optimise airfow for improved combustion efciency.
Dual VVT-i helps boost response levels across the entire rev range by varying the air-fuel intake and exhaust valve timing to suit the conditions at any given time. In addition to improving torque at low and medium engine speeds, the system also reduces emissions and enhances fuel efciency.
New Stop & Start technologyAvailable with the 1.33 litre petrol engine, a new Stop & Start system automatically switches of the engine when the vehicle is stopped. Under urban driving conditions, the system delivers signifcant reductions in fuel consumption and CO2 emissions (up to 4%).
Toyota's Stop & Start system features the world's frst permanently engaged starter motor gear mechanism. This equips the system with two major benefts: outstanding quietness and rapid restart.
The Stop & Start system turns of the engine whenever it is not needed. When the car comes to a halt, the engine stops when the shift is in neutral position and the clutch pedal is released. In addition, and in order not to afect driving comfort and safety, certain other conditions must be fulflled. For example, the engine will not stop if the desired cabin temperature has not been reached. When that temperature is reached, the air-conditioner will switch to "ECO-run loading", allowing the engine to automatically stop. The engine will automatically restart in the event of low battery charge, or if the vehicle begins to move, in the interests of safety.
New 6-speed manual transmissionAlso benefting from Toyota Optimal Drive technology, a new 6-speed transmission has been developed for the 1.33-litre Dual VVT-i and 1.4-litre D-4D engines. Gear changes are exceptionally quiet and smooth, and the new transmission achieves world-class levels of efciency and improved fuel economy due to a wide sixth gear ratio.
Revised 1.4-litre D-4D diesel engineAvailable with either a 2WD or AWD drivetrain, the 1.4-litre D-4D common rail diesel engine has been comprehensively re-engineered. Equipped, as standard, with a Diesel Particulate Filter (DPF), the intercooled turbodiesel employs the very latest piezo-electric technology.
Benefting from an exceptionally high injection pressure of 160 MPa, the piezo-electric injectors can supply larger, more precise volumes of diesel at twice the speed of conventional fuel injectors. Because of their high operating speed, they can deliver multiple injections per combustion cycle, optimising the combustion process for responsive performance with low fuel consumption and reduced emissions.
The unit generates 66kW/90 DIN hp and maximum torque of 205 Nm at 1800-2800 rpm. Front wheel drive versions return fuel consumption fgures of 4.5l/100km and CO2 emissions of only 118g/km. The AWD version returns fuel consumption fgures of 4.9l/100km, and CO2 emissions of just 130g/km the world's lowest emissions for an all-wheel driven passenger car.