Appendix B has all the data necessary to exactly calculate the targeted engine efficiency.
- petrol
- energy density of fuel: 39.55 MJ/kg
- BFSC: 220 gr/kWh -> 16.36 MJ/kg
- efficiency = 41.4 %
- diesel
- energy density of fuel: 42.31 MJ/kg
- BFSC: 195 gr/kWh -> 18.46 MJ/kg
- efficiency = 43.6 %
Kinosh!ta of Toyota mentioned that the efficiency target would be 41.5% for petrol engines and 42.5% for diesel engines (see
post #2268). His numbers were only correct for petrol engines.
Anyway, I have to agree that the target efficiency for diesel engines is much too low with regards to that for petrol engines.