FuzzBob wrote:Only in downtown driving. NOT on the expressway, and especially NOT long distance. The Metro got 50 MPG highway, the Metro XFi 58. The Prius gets somewhere in the lower 40s in the real world (i.e. not EPA or CU "granny driving" mileage tests). That's only maybe a whopping 5-ish mpg better than my old '95 Sentra with a stick that did 37 on the Interstate.
Apples and oranges. You're comparing EPA/anecdotal highway numbers from the cars you favor with anecdotal "real world" combined numbers from the one you don't.
Here's a non-selective comparison: the Metro's 58mpg rating you cite is from an old system, and the EPA's current retroactive figures are 51 hwy, 43 city (compared with the Prius' 48 and 45).
http://www.fueleconomy.gov/FEG/bymodel/ ... etro.shtmlSo by driving a much smaller car with less than half the power, you can save 3mpg on the highway... and lose 2mpg in the city.
By the way, you are aware that CU's "granny driving" is consistent across all the vehicles they test, and it stands to reason that it should undercount the advantage of a hybrid, right? The regenerative braking advantage would show up better in more aggressive highway drivers who vary their speeds more.
That could explain what the notorious "granny drivers" at Car & Driver found when they compared two hybrids (the Prius and the no-longer-available Civic hybrid) against the most popular diesel (the Jetta) and a typical tiny car (the Toyota Echo, since replaced by the Yaris). The Prius easily beat the diesel and the much-smaller gasoline car in city and highway mileage.
http://www.caranddriver.com/reviews/com ... rison_testThe idea that hybrids only help in the city is a half-true extrapolation from the fact that the regenerative braking system doesn't do much at steady highway speeds. This theoretical idea doesn't acknowledge the reality that part of the Prius' hybrid system is having a smaller-than-normal gas engine. Around town and during hard acceleration, the small gas engine is aided by the electric motor, and at highway speeds (where it's sufficient by itself) its small displacement improves the mileage.
Moral of the story: hybrid tech is nice and does make a difference (I'm holding out for the hybrid Fit coming out next year) but ultimately the real solution is still hauling around less tonnage.
Absolutely agreed on that. But as you point out yourself, why not have both? And the Geo vs. Prius comparisons (aside from being pretty inconclusive) only apply in an alternate universe where people buy cars with no regard to power or size. We're stuck with this world, so short of a decree that no one can buy cars over 2000 pounds, mid-sized hybrids are one of the better ways to decrease fuel use.
My guess is that Toyota plans eventually to roll out the hybrid system eventually to its entire lineup, and had pretty valid reasons not to introduce it in their smallest car. The R&D represented a huge investment that couldn't be paid off with the revenue from a tiny fringe of consumers who wanted Metro-sized cars back in the late '90s. This way, the general public has gotten used to hybrids without thinking of them as austerity measures.