Yaris motor in a Corolla...
 

Anyone done it? I heard the Corolla was available with the 1.5L outside of the US, but it's not an option here. The 07 1.8L Corolla seems to get 1mpg more than the 1.5L Yaris. Gearing maybe, or an inaccurate test? The 1.5L should get better economy than the 1.8L in the Corolla, otherwise why would Toyota offer it overseas?

Emission standards?

Well, no the 1.5L is available in the states, in the yaris, but they don't offer it in the Corolla.

Two entirely different motors.
The grey market Corolla was equipped with a 1.6L (3ZZ-FE) engine.

The Yaris/Echo/Prius motor is the 1NZ-FE.

Not even worth the headache of swapping, if you want 1500ccs go buy a Fit or a Yaris and save yourself the headaches.

The 1.5L Corolla motor is a 1NZ-FE and as far as I know, there's nothing gray-market about it. They just don't stick that particular motor into this particular car for US models.
This is from corolland.com

Are the mounts the same? You could do it, of course, but for what expense?

Must be for our 7th and 8th gens then I am guessing, if it's for the 10th good luck carrying all that extra weight (and why would you do that to a brand new car?).

I doubt the mounts are the same and wiring would be a nightmare.

Displacement tends to be taxed overseas, and driving is closer to what's seen as Urban here in the states.

Umm Horsepower / displacement / large size is "Required" in America/ No Markert in USA for small low power cars.

That's the standard excuse I hear.

As a rule Toyota motrs swap allright, not much differant than Honda. Might be easiest to import a front clip from a wreck in a "lucky" country. I bet you can get one cheap if you try.

I would consider doing this to a 9th gen 5spd. It should get better FE than 10th gen and at ~2600lbs, the 1.5L shouldn't have too much trouble pushing it around. I wouldn't think it would be too expensive, especially since I can sell the 1ZZ.

For a highway commuter, this car would be better than a Prius. The electrics do very little on the highway, and just add up to dead weight. I think 50 MPG should be possible without resorting to aero mods. City mileage, though not as good as the Prius, should still be very respectable.

Do you believe it? I do. I wouldn't think it would cost Toyota a hell of a lot to offer the 1.5L as an option. The motor is already stateside legal. I think they're afraid a 1.5L Corolla would cut into Prius sales.

Also, a lot of manufacturer's have this idea that just because we want a nice car, we're willing to shell out for gas. For example, the BMW 318/i/is/ti didn't meet its death in 1999, BMW just stopped bringing it to the states. Is a well built, comfortable interior and respectable fuel economy mutually exclusive? Or would good fuel economy turn BMW into a "poser" brand because people who blew 60K on an M3 don't want their car to look like something that can get 35mpg? You know, kind of how V6 Mustangs with dual pipe kits piss off GT owners.