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    Power Output Ratings, BK

    The following data is taken from official Mazda3 brochures in my possession now, and available at the time from dealers for the years 2005, 2006, 2007, and 2008, and from various issues of Road & Track and Car and Driver magazines. In addition to the original SAE net BHP and Torque figures given, I've included a conversion to SI units and as well added calculated brake mean effective pressure (BMEP) values for the non-PZEV engines (for an explanation, see below). Engines have two BMEP ratings - one at max BHP, one at max torque - the latter always the greater of the two. For more information about BMEP, go to:


    All Mazda3 engines are 4-cylinder inline DOHC with variable valve timing (VVT), and all with the exception of the Mazdaspeed Turbo (with a 6,700 rpm redline) have a redline of 6,500 rpm. The 2.3 L engines have a dual balance shaft.

    LF-DE MZR 2.0 L Engine (2004-2005)
    Displacement: 1999 cc
    Bore x Stroke: 87.5 mm x 83.1 mm
    CR: 10:1
    BHP: 148 @ 6,500 rpm, SAE net (110 kW); BMEP: 148 psi
    Torque: 135 lbs/ft @ 4,500 rpm, SAE net (183 Nm); BMEP: 166 psi
    BHP: 144 @ 6,500 rpm, SAE net (107 kW) PZEV*
    Torque: 132 lbs/ft @ 4,500 rpm, SAE net (179 Nm) PZEV*

    LF-VE MZR 2.0 L Engine (2006-2009)
    Displacement: 1999 cc
    Bore x Stroke: 87.5 mm x 83.1 mm
    CR: 10:1
    2006 MODEL YEAR
    BHP: 150 @ 6,500 rpm, SAE net (112 kW); BMEP: 150 psi
    Torque: 135 lbs/ft @ 4,500 rpm (183 Nm); BMEP: 166 psi
    BHP: 145 @ 6,500 rpm, SAE net (108 kW) PZEV*
    Torque: 132 lbs/ft @ 4,500 rpm (179 Nm) PZEV*

    2007-2009 MODEL YEARS
    BHP: 148 @ 6,500 rpm, SAE net (110 kW); BMEP: 149 psi
    Torque: 135 lbs/ft @ 4,500 rpm (183 Nm); BMEP: 166 psi
    BHP: 144 @ 6,500 rpm, SAE net (107 kW) PZEV*
    Torque: 132 lbs/ft @ 4,500 rpm (179 Nm) PZEV*

    L3-VE MZR 2.3 L Engine (2004-2009)
    Displacement: 2260 cc
    Bore x Stroke: 87.5 mm x 94 mm
    CR: 9.7:1
    2004-2006 MODEL YEARS
    BHP: 160 @ 6,500 rpm, SAE net (119 kW); BMEP: 141 psi
    Torque: 150 lbs/ft @ 4,500 rpm (203 Nm); BMEP: 164 psi
    BHP: 153 @ 6,500 rpm, SAE net (114 kW) PZEV*
    Torque: 149 lbs/ft @ 4,500 rpm (202 Nm) PZEV*

    2007-2009 MODEL YEARS
    BHP: 156 @ 6,500 rpm, SAE net (116 kW); BMEP: 138 psi
    Torque: 150 lbs/ft @ 4,500 rpm (203 Nm); BMEP: 164 psi
    BHP: 151 @ 6,500 rpm, SAE net (113 kW) PZEV*
    Torque: 149 lbs/ft @ 4,500 rpm PZEV*

    * PZEV (Partial Zero Emission Vehicle) - A more stringent set of emissions limits compared with the federal level, resulting in a small decrease in both BHP and torque ratings, required for motor vehicles to be sold in the following states: CA, MA, ME, NY, and VT. For 2010, (BL Chassis vehicles), CT, NJ, OR, PA, RI and WA have been added to the list.

    L3-VDT MZR 2.3 L DISI Turbo Engine (2007-2009)
    Displacement: 2260 cc
    Bore x Stroke: 87.5 mm x 94 mm
    CR: 9.5:1
    BHP: 263 @ 5,500 rpm, SAE net (196 kW); BMEP: 275 psi
    Torque: 280 lbs/ft @ 3,000 rpm (380 Nm); BMEP: 306 psi

    Readily noted is the enormous increase in both power output and BMEP in the turbo engine compared with the normally aspirated models. Equally interesting is the fact that the normally aspirated 2.0 L engine has a higher BMEP at both max BHP and max torque, than the larger, more powerful, 2.3 L engine. This indicates that the smaller engine is a more efficient powerplant. If I had to guess the reason for this outcome, I'd chalk it up to the longer stroke, and lower CR of the larger engine, as well as the dual balance shafts which reduce net BHP by the amount required to bring about their rotation.

    Happy Motoring!
    Last edited by goldstar; 11-04-2011, 08:07 AM.
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