Remember how i said "unrealistic" and not "lower"? WLTP is a rather unrealistic way to determine fuel consumption or energy usage on cars. If you look at sites which collect fuel usage for cars you often times see fuel usages considerably higher than what WLTP defines. Especially if it's a PHEV since WLTP expects a full battery all the time. Under 2L/100km for a 2 ton SUV is not realistic by any stretch of the imagination. The numbers on https://www.spritmonitor.de/ for example seem to allign more with EPA in my experience.
> Especially if it's a PHEV since WLTP expects a full battery all the time. Under 2L/100km for a 2 ton SUV is not realistic by any stretch of the imagination. The numbers on https://www.spritmonitor.de/ for example seem to allign more with EPA in my experience.
There's a question as to what you're trying to model; if you're looking at daily usage then relatively short distances from fully charged are probably relatively representative of a lot of usage (the mean and median distances driven on a daily basis are relatively short distances!).
In reality, I suspect what would be useful is to have a further cycle based on a 100km journey largely on a motorway, as a long-distance extra-urban cycle?
Very good question: WLTP has just a number for you.
PHEVs may not be a good idea depending on your driving style. There should be more discussion about what type of engine is the correct one for you before buying. Do you drive enough motorway regularly that a diesel would make sense? Do you drive shorter distances but you cannot charge? Can you charge but you sometimes need more range? Maybe even a PHEV diesel would make sense, but that is a type of vehicle that was rare and is now even rarer.
Technology was improved a lot over the last decades. If you'd record the WLTP tests you could maybe build a system which would accurately calculate your fuel usage for your type of driving and define if a PHEV or a diesel would make any sense for you.
So your criticism is actually in the context of ICE and PHEVs - I assumed you meant pure EVs since that what this thread seemed to be about, and for those autonomy numbers seem to be strictly lower, hence my confusion why WLTP would be more doctored in this regard than NECD.
I have looked at the Model 3 and Hyundai Ioniq and even there the energy usage seems to be rather off. 15 kWh/100km WLTP vs 19 kWh/100km according to spritmonitor on the Model 3. 11 vs 14 with the Ioniq.
So yeah, it seems like WLTP is not really accurate for EVs either.
