Used 2018 Nissan Altima Sedan Trims Comparison

Standard features for the 2.5 S include 16-inch steel wheels with plastic covers, a rearview camera, keyless entry and ignition, a height-adjustable driver seat, 60/40-split folding rear seats, Bluetooth, a 5-inch display screen, and a six-speaker audio system with a USB port. Also standard for 2018 is a forward collision warning system with automatic emergency braking.

The sporty 2.5 SR trim upgrades the 2.5 S with 18-inch alloy wheels, daytime running lights, foglights, a rear spoiler, a sport-tuned suspension, a leather-wrapped steering wheel, paddle shifters (with seven simulated shift points), upgraded upholstery and a power-adjustable driver seat.

Compared to the 2.5 S, the 2.5 SV trim has 17-inch alloy wheels, LED daytime running lights, remote engine start, blind-spot monitoring with rear cross-traffic alert, dual-zone automatic climate control, satellite radio and the SR's foglights, power driver seat and leather-wrapped steering wheel. The 2.5 SL adds LED headlights, power-folding mirrors, a heated steering wheel, leather upholstery, heated front seats, air vents for the rear seats, a power front passenger seat and a nine-speaker Bose premium audio system.

The 3.5 SL is the only model not powered by the 2.5-liter four-cylinder engine. Instead, a 3.5-liter V6 lies underhood, developing a healthy 270 hp and 251 lb-ft of torque. It also gets 18-inch wheels, front and rear parking sensors, a sunroof, heated mirrors, paddle shifters, adaptive cruise control, an auto-dimming rearview mirror, a 7-inch touchscreen, a navigation system, Android Auto and Apple CarPlay smartphone connectivity, and NissanConnect services with emergency telematics.

All four-cylinder trims can be ordered with a single package that adds features from upper levels. For example, the Convenience package for the 2.5 S only adds a power driver seat and remote engine start, while the 2.5 SR's Special Edition package includes satellite radio, heated front seats, synthetic leather upholstery, and the 7-inch touchscreen with Android Auto and Apple CarPlay.