In terms of dimensions, the Iriz measures 3,905mm in length versus the Myvi's 3,690mm; it is also wider at 1,720mm (Myvi: 1,665mm), and is 5mm higher than the Myvi (1,550 for Iriz versus 1,545 for Myvi).
The Proton Iriz is powered by either a 1.3-litre or 1.6-litre four-cylinder engine.