We have a 2001 Echo and 2003 Prius and both vehicles have the same, 1500
cc engine block. The Echo is Otto cycle and the Prius Atkinson. Both
seat 5 and have similar outside dimensions but the Echo trunk is a
little larger. However the Echo is about 600 pounds lighter.
The automatic transmission Echo gets 32 MPG and the automatic
transmission Prius gets 52 MPG.