Maxima sl! Loaded...POWER SUNROOF, PREMIUM SOUND and HEATED LEATHER SEATS. 3.5l v6 smpi dohc. Yeah baby! Oh yeah! This gorgeous 2005 Nissan Altima is not going to disappoint. There you have it, short and sweet! New Car Test Drive called it ...bigger and roomier than most mid-sized sedans, with comfortable accommodations front or rear, and plenty of space to haul stuff... It's the combination of advanced design and precision engineering that makes the 3.5l v6 smpi dohc engine such an impressive powerplant. J.d. Power and Associates gave the 2005 Altima 4 out of 5 Power Circles for Overall Initial Quality Design.