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CO2 is a crap pollution figure. If you're emitting less CO2, all that means is that you're being more fuel efficient.
Sulfur is directly related to the sulfur in the fuel. Better fuel, less sulfur.
NOx is the big issue, but with newer direct injection systems in play and urea injection, not so big.
Having tested it firsthand, a hybrid will consume less in stop-start traffic than a diesel. Engine stop-start technology is all fine and well, but if you don't have the batteries to run the AC in sweltering summer heat, then you're going to have the engine running sometimes, at a stop.
It then comes down to whoever has the most battery life to run the climate control, running lights (what about night-time traffic?) and associated frippery. That's where hybrids shine.
But this is compared to a top-of-the-line diesel compact... what if you compare it to a compact with a similar focus on economy?
Take the new Hyundai i30 (haven't tested it, but we're lined up and waiting). 1.6 liter diesel engine. Should do 0-60 in the same 10-ish that the Prius hybrid does, with a little more power on the freeway. Officially does 50 MPG (US), but has done over 70 MPG in long drives. And it costs less than the Prius, too... in fact, costs just about as much as a regular 1.8 - 2.0 compact sedan.
Sulfur is directly related to the sulfur in the fuel. Better fuel, less sulfur.
NOx is the big issue, but with newer direct injection systems in play and urea injection, not so big.
Having tested it firsthand, a hybrid will consume less in stop-start traffic than a diesel. Engine stop-start technology is all fine and well, but if you don't have the batteries to run the AC in sweltering summer heat, then you're going to have the engine running sometimes, at a stop.
It then comes down to whoever has the most battery life to run the climate control, running lights (what about night-time traffic?) and associated frippery. That's where hybrids shine.
But this is compared to a top-of-the-line diesel compact... what if you compare it to a compact with a similar focus on economy?
Take the new Hyundai i30 (haven't tested it, but we're lined up and waiting). 1.6 liter diesel engine. Should do 0-60 in the same 10-ish that the Prius hybrid does, with a little more power on the freeway. Officially does 50 MPG (US), but has done over 70 MPG in long drives. And it costs less than the Prius, too... in fact, costs just about as much as a regular 1.8 - 2.0 compact sedan.