Powertrain Features at A Glance

2.4-liter Inline 4-cylinder Engine (LX, LX-P Sedan)

• 2.4-liter, DOHC, i-VTEC® inline four-cylinder engine
• 177 horsepower at 6500 rpm
• 161 lb-ft. of torque at 4300 rpm
• i-VTEC® (Variable Valve Timing and Lift Electronic Control) + VTC (Variable Timing Control)
• EPA-estimated fuel economy of 21/31 mpg (AT Sedan) City/Highway¹
• Regular unleaded fuel
• Direct ignition system
• Drive-by-Wire Throttle System™
• 5-speed automatic (available) or 5-speed manual transmissions
• Close-coupled catalytic converter plus under-floor catalytic converter
• ULEV-2 emissions compliant
• PZEV (AT only) version sold in California, Connecticut, Maine, Massachusetts, New York, Pennsylvania, Rhode Island and Vermont
• Dual-probe spark plugs
• Unique i-VTEC system provides single exhaust valve operation at low rpm

2.4-liter Inline 4-cylinder Engine (EX, EX-L Sedan; LX-S, EX, EX-L Coupe)

• 2.4-liter, DOHC, i-VTEC® inline four-cylinder engine
• 190 horsepower at 7000 rpm
• 162 lb-ft. of torque at 4400 rpm
• i-VTEC® + VTC
• EPA estimated fuel economy of 22/31 mpg (MT) City/Highway¹
• Regular unleaded
• Direct ignition system
• Drive-by-Wire Throttle System™
• 5-speed automatic or 5-speed manual
• Close-coupled catalytic converter plus under-floor catalytic converter
• ULEV-2 emissions compliant
• PZEV (AT only) version sold in California, Connecticut, Maine, Massachusetts, New York, Pennsylvania, Rhode Island and Vermont
• Dual-probe spark plugs
• Unique i-VTEC system provides single exhaust valve operation at low rpm

V-6 Engine with Automatic Transmission (EX V-6, EX-L V-6 Sedan; EX V-6. EX-L V-6 Coupe)

• 3.5-liter, SOHC, i-VTEC® V-6
• 268 horsepower at 6200 rpm
• 248 lb-ft. of torque at 5000 rpm
• i-VTEC® provides Variable Cylinder Management (VCM) for fuel efficiency
• Magnesium intake manifold and valve cover
• Close-coupled catalytic converters plus under-floor catalytic converter
• EPA estimated fuel economy of 19/29 (Sedan), 19/28 (Coupe) mpg City/Highway¹
• Regular unleaded
• Direct ignition system
• Drive-by-Wire Throttle System™
• 5-speed automatic
• ULEV-2 emissions compliant
• PZEV version sold in California, Connecticut, Maine, Massachusetts, New York, Rhode Island and Vermont
• Dual-probe spark plugs

V-6 Engine with Manual Transmission (EX-L V-6 6-Speed Coupe)

• 3.5-liter, SOHC, VTEC® V-6
• 268 horsepower at 6200 rpm
• 248 lb-ft. of torque at 5000 rpm
• VTEC® with variable intake manifold provides two intake cam profiles for enhanced low- and mid-range torque
• Close-coupled catalytic converters plus under-floor catalytic converter
• ULEV-2 emission compliant
• EPA estimated fuel economy of 17/25 mpg City/Highway1
• Regular unleaded
• Direct ignition system
• Drive-by-Wire Throttle System™
• 6-speed manual

Shared Engine Features
The following engine technologies are shared among all 2008 Accord models unless noted.

i-VTEC (all except Accord V-6 6MT Coupe)
Though the Accord four-cylinder engines and the V-6 with automatic transmission are all called i-VTEC powerplants, it is important to note that the details in each application differ. Honda's four-cylinder engines have double overhead camshafts (DOHC) and i-VTEC that is comprised of VTEC + Variable Timing Control (VTC) of the intake camshaft for optimized power production and fuel efficiency. In addition, PZEV variants also idle one of the two exhaust valves in each cylinder at low rpm for enhanced emissions performance. Accord V-6 engines (with the automatic transmission) use a Single Overhead Camshaft (SOHC) design that features i-VTEC with Variable Cylinder Management (VCM) to maximize fuel economy.

Dual-Probe Spark Plugs
The Accord's 4-cylinder and V-6 PZEV-compliant engine uses special dual-probe spark plugs (a first for Honda in North America) for faster mixture ignition speed and improved combustion stability. With the spark arcing just beyond the relatively large surface of the ground area, the air/fuel mixture is exposed to a larger portion of the spark, which enhances stable combustion.

Drive-By-Wire (DBW) Throttle System™
The Accord's drive-by-wire throttle system uses smart electronics instead of a conventional cable system to connect the throttle pedal to the throttle butterfly in the intake tract. Besides allowing engineers to program the relationship between throttle pedal movement and engine response, the system offers optimizes engine response to suit driving conditions. The system monitors throttle pedal position, throttle butterfly position, road speed, engine speed and engine vacuum. This information is used to define the throttle control sensitivity.

Programmed Fuel Injection (PGM-FI)
The Accord's PGM-FI continually adjusts the fuel delivery to yield the best combination of power, low fuel consumption and low emissions. Multiple sensors constantly monitor critical operating parameters, such as throttle position, intake air temperature, coolant temperature, ambient air pressure, intake airflow volume, intake manifold pressure, exhaust air-fuel ratio and the position of the crankshaft and cams.

Direct Ignition System
All Accord engines use direct ignition, which has a coil unit for each cylinder, positioned within each spark plug's access bore.

Fuel Injectors
The Accord engine's fuel injector nozzles reduce the typical size of fuel droplets by 34 percent compared to the 2007 model, which improves atomization and flame propagation inside the combustion chambers. The better atomization enhances combustion and reduces emissions.

High-Efficiency Catalytic Converters
Key contributors to the Accord engine's excellent emissions performance are its high-efficiency catalytic converters. All engines have their exhaust manifold(s) cast directly into the aluminum alloy cylinder head(s) to reduce weight and position each primary catalytic converter as close as possible to the combustion chambers. A high-efficiency close-coupled converter mounts directly to the exhaust port of each cylinder head for extremely rapid converter activation after engine startup. A second converter is positioned shortly downstream, beneath the passenger compartment floor. Both converters use a new thin-wall design that increases internal reaction area and improves efficiency.

Maintenance Minder System and Tune-Up Intervals
The Accord's standard Maintenance Minder system calculates the engine's tune-up schedule based on driving conditions (tracked by the ECU). When determining proper maintenance intervals, the system minimizes owner guesswork about whether the vehicle is being operated in standard or severe conditions. The Accord's Maintenance Minder information appears in the odometer display, and indicates when to change the oil, oil filter (every other oil change), air cleaner, transmission fluid, spark plugs and coolant, as well as when to rotate the tires. A tune-up is not required until 100K+/- Miles No Scheduled Tune-ups (may vary with driving conditions. Does not apply to fluid and filter changes. Exact mileage is determined by actual driving conditions. The owner's manual contains full detail).

Regular Unleaded Fuel Operation
To keep operating costs at a minimum, all Accord models are designed to use relatively less-expensive regular unleaded fuel, thanks to compact 4-valve combustion chambers and precise fuel injection and spark control.