Mazda has dropped the first photos and details on its 2012 model year Mazda3 sedan and five-door hatchback models that are making their world premiere at this week's 2011 Canadian International AutoShow in Toronto. All we know for now is that the engine will feature direct-injection tech and a high compression ratio, while the transmission is said to be compact in size and light in weight, with both contributing to an improved fuel efficiency and reduced CO2 emissions.
