Except the engine also provides propulsion also, as the engine be powering the wheels and charging the battery or powering the wheels with the aid of the electric motor. A beauty of the A25A-FXS is the thermal efficiency, of 41% at about 1900 rpms and somewhere in the low 2000 rpms, which is why the ECU tells the e-CVT to preferably hang out of those 2 rpms.The engine is basically a battery charger. Doesn't need tons of torque. That said, Toyota has a much bigger engine in their hybrids than companies like Honda, for example. I doubt more torque would help them.
The crown sedan and Grand Highlander has both A25A hybrid and the T24A (2.4L turbo (hybridMAX) systems. The more torque of the hybridmax system definitely helps with performance, at the expense of mpg.
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