The Yaris iA's standard 6-speed manual gearbox and optional 6-speed automatic transmission are bolted to a smooth-revving, Mazda-sourced, 1.5-liter 4-cylinder engine that makes 106 horsepower and 103 lb-ft of torque. Row the gears yourself and you can expect to get 34 mpg in combined driving. Choose the automatic, and the car should return 35 mpg.
My test car had the automatic, and it returned 33.6 mpg on my test loop, but I drove it harder than you would. Also, by the end of a week serving my household, the Yaris iA’s average had crept up to 34.7 mpg.
Because the car is so light, weighing either side of 2,400 pounds depending on the transmission, there is an adequate amount of power unless you’re on a short freeway on-ramp leading to fast-flowing traffic or you’re trying to pass slower vehicles. Sincerely, I do not recommend trying to pass on a two-lane road unless you have a death wish of some kind.
Around town, the Yaris iA feels lively enough provided you’re not trying to win an impromptu drag race. A Sport driving mode provides extra responsiveness by eliminating the transmission’s tendency to upshift into second gear sooner than you might like, but it also holds engine revs higher when you’re just driving along at a steady rate of speed.
Alternatively, the automatic transmission provides a manual shift gate that allows the driver to take full control of shifting. Just remember that you push the gear selector forward, or up, to downshift and back, or down, to upshift. This pattern is derived from F1 racing, where drivers fighting against significant g-forces require it. Since a Yaris iA generates virtually no g-forces, this design simply comes across as counterintuitive.
On the highway, the key is to preserve your momentum. The car’s tidy size and excellent outward visibility help in this regard, and an attentive driver can pick a line through traffic in order to maintain speed. Plus, when the car encounters a hill, the transmission automatically holds a lower gear to keep the Yaris iA from becoming a rolling traffic cone. I tackled the Conejo Grade in California’s Ventura County at a steady 75 mph, the car’s refined power plant issuing not a hint that it was working overtime.
Where Mazda’s engineering brilliance shines brightest is with regard to the car’s ride and handling. The underpinnings are simple: MacPherson struts up front, a torsion beam rear axle, front disc and rear drum brakes, and electric-assisted steering. But Mazda tunes these basic components to deliver engaging driving dynamics.
The ride is almost supple. The handling is light and lively. The car is tossable in turns and solidly secure at speed. Yes, you can tell from the brake pedal’s feel that the Yaris iA is using drums in the back, but modulation is better than expected. And yes, the electric steering’s sport tuning appears to add more heft than it does actual road feel, but it proves reasonably sharp and responsive even if it feels a bit disconnected on center.
If there’s anything to complain about with regard to the Yaris iA’s handling, it’s that the 185/60R16 tires run out of talent pretty early in the game, making for squirrely at-the-low-limit driving. Still, this is an unexpectedly enjoyable car to drive, offering proof that it is often more fun to drive a slow car fast than it is to drive a fast car slow.