Join Date: Aug 2005
Location: Ellicott City, MD
Re: mazda3 pwnable by 138hp toyota?
Yeah the MR2 weighs in at about 2200lbs with 138hp. You Mazda 3 depending on model year and hatchback or sedan weighs in the range of 2760-2900lbs with (actually) 156hp. You might have a lot more torque, but that MR2 has impressive power to weight and better launches due to mid/rear setup.
As a note the Society of Automotive Engineers changed their testing standards for determining horsepower and this resulted in a slight drop in most vehicles advertised power production, which is why 07 and later mazda 3 shoes 148hp for the 2.0 and 156hp for the 2.3.
My guess is if the MR2 was ever recertified under the new SAE rules (and it won't be, its dead) it would likely be putting out between 132 and 136hp. Regardless, the MR2 has you on power to weight by a lot.
MR2 15.9lbs per hp
Mazda 3s 17.25hp to 18.1lbs per hp (using the old 160 number) depending on sedan or hatch and model year (The 07+ seems to have porked on an extra 100lbs somewhere).