1.8L DOHC I-4 (Scion xD)

128 hp/125 lb.-ft.

+ Sips

- Might as well be electric

= Innocuous in every way

3.5L DOHC V-6 (Lexus IS 350)

306 hp/277 lb.-ft.

+ Carries a seriously big stick

- Speaks softly, though

= Subtle but convincing

5.7L DOHC V-8 (Tundra)

381 hp/401 lb.-ft.

+ Sets the bar pretty high

- Undoes a lot of enviro work, no?

= When you insist on refinement with power