Specifications Comparison: 2003 Kia Optima vs 2021 Mazda 6

Curb Weight

Trim	Engine	Drive train	Curb Weight	Horsepower	Weight / Horsepower Ratio
LX	2.4L I4	FWD	3,281 lbs.	138 hp	23.8 lbs/hp
SE	2.4L I4	FWD	3,301 lbs.	138 hp	23.9 lbs/hp
LX	2.7L V6	FWD	3,279 lbs.	170 hp	19.3 lbs/hp
SE	2.7L V6	FWD	3,279 lbs.	170 hp	19.3 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