2.5L DOHC I-4 Hybrid (Altima Hybrid)

158 hp/162 lb.-ft.

+ Fine integration

- Available in only 8 states

= Going through the motions

2.5L DOHC I-4 (Sentra SE-R Spec V)

200 hp/180 lb.-ft.

+ Sharp throttle

- Otherwise uninvolving

= Others do the cooking 4-cyl. way better

3.5L DOHC V-6 (350Z)

306 hp/268 lb.-ft.

+ Still smokes

- Still vibrates

= Still formidable

3.7L DOHC V-6 (Infiniti G37 Coupe 6MT)

330 hp/270 lb.-ft.

+ Impressive power rush

- We’d rather see displacement going the other way

= Sensational