Specifications Comparison: 2005 Nissan Altima vs 2021 Mazda 6

Curb Weight

Trim	Engine	Drive train	Curb Weight	Horsepower	Weight / Horsepower Ratio
(5 Spd)	2.5L I4	FWD	3,001 lbs.	175 hp	17.1 lbs/hp
S	2.5L I4	FWD	3,039 lbs.	175 hp	17.4 lbs/hp
SL	2.5L I4	FWD	3,106 lbs.	175 hp	17.7 lbs/hp
SE	3.5L V6	FWD	3,197 lbs.	250 hp	12.8 lbs/hp
SER	3.5L V6	FWD	3,279 lbs.	260 hp	12.6 lbs/hp
SL	3.5L I4	FWD	3,296 lbs.	250 hp	13.2 lbs/hp

Trim	Engine	Drive train	Curb Weight	Horsepower	Weight / Horsepower Ratio
Mazda Carbon Edition	2.5L I4	FWD	3,582 lbs.	227 hp	15.8 lbs/hp
Mazda GT	2.5L I4	FWD	3,582 lbs.	227 hp	15.8 lbs/hp
Mazda GT Reserve	2.5L I4	FWD	3,582 lbs.	227 hp	15.8 lbs/hp
Mazda Signature	2.5L I4	FWD	3,582 lbs.	227 hp	15.8 lbs/hp
Mazda Sport	2.5L I4	FWD	3,437 lbs.	187 hp	18.4 lbs/hp
Mazda Touring	2.5L I4	FWD	3,437 lbs.	187 hp	18.4 lbs/hp