said by IamGimli:
Some of the downsides of diesel engines in Canada:
Lower tolerance for extreme cold weather. At -25 and below a cold diesel engine will be extremely hard to get running, unless you have an engine block heater plugged-in. Out in Alberta, when the temperature dips below -35 you'll see all the diesel trucks running in driveways through the night for that reason.
Noisier engines in general than gas engines. This isn't the case as much anymore since advancements in diesel engineering has reduced the engine noise, and gas engines are noisier than they used to be (especially on engines with direct fuel injection).
Exhaust gases smell. Bad. Especially when the engine gets older. Makes some people noxious.
Diesel prices, which used to be much lower that gasoline (almost half price) now pretty much keeps up or is slightly more expensive.
Diesel isn't available at all gas stations and when it is, it is often only one or two pumps, which may make refueling take much longer, especially if you have to wait for a specific car to get out of the way of the one pump.
Most diesel engines (even the turbo) lack top-end power. They generally have great torque but lower HP numbers than the same car with a gas engine. You might have to change the way you drive, or your expectations of performance.
Personally if more cars were available with a turbo diesel option I would certainly consider them but you do have to go in knowing what to expect.