2010 Mazda3:
Engine: 2.5L DOHC I4
Horsepower: 170
Torque: 170
Mods: short ram air intake
Transmission: standard
Weight: approx 1300 kg

2008 Acura RDX:
Engine: 2.3L turbo charged I4
Horsepower: 240
Torque: 260
Mods: none
Transmission: automatic*
Weight: approx 2300 kg

the acura beats the mazda in horsepower and torque but it is an automatic and it weights nearly a tonne more. Thoughts?

acura will be faster 100%)

Yes, the Acura RDX is a good bit faster than the Mazda3.