Toyota Prius 2004 Product Bulletin page 36

In addition, the 1.5 litre VVT-I engine has also been improved to produce
more power.
VVT-i engine
Powe r (kW / hp)
Max torque (Nm)
The result is a powertrain delivering torque levels normally associated with
V6 diesels. It is this combination that makes Hybrid Synergy Drive the
benchmark hybrid system.
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