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NHC
City - 10.9
Highway - 16.6
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And the Baleno figures are approx 9.8 and 15.8 or therabouts..(Don't have ACI handy at this moment.). Shows a 1 Km difference in city and in highway.
(Also ACI quoted figures are for the Euro II Baleno. A Euro III is more FE.)
Ofcourse the figures of Lancer would be similar. And those of the NHC Vtec would be similar to the Baleno/Lancer rather than the Accent Crdi or the NHC Idsi.
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How can you compare a 77bhp engine with a 106 bhp one or even the new Vtec? Obvoiusly the huge hp diff will increase FE. Why not try comparing it to any other 1.5-1.6 ltr "Naturally Aspirated" car producing 100-106 bhp, then you'll see the diff.
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That's the pt. Even with the 77Bhp engine the NHC Idsi is at best 1-1.5 Km more FE as compared to the other japanese/light-efficient cars having power in the range of 85-100 Hp. So the NHC Vtec figures would be similar to other cars(being a little lesser than the NHC Idsi). For comparison Baleno,Lancer Petra(to an extent) and probably even the Fiesta 1.6.
I am sure there are other reasons to buy the NHC VTec than FE. Don't think anyone bought the OHC Vtec bcoz of FE. The FE issue is blown out of proportion, as i said before there are cars that are similar(not same) in FE as the NHC Idsi,Vtec.
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Does this mean one should use minimum 91 Octane fuel in them ?
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Fiesta is built and optimized for 91 Octane. Lesser Octane will just retard the timing and lead to lesser efficiency. Dunno about the NHC.
But i think it's safe to use the IOCL 91 Octane Xtra premium. It surely makes a performance/FE difference in almost all cars old and new. I have never reverted back to 87 Oct Unleaded or Power, Speed(87 Oct) after having used IOC's Xtra Premium.