2008 Acura RDX - Powertrain POWERTRAIN Acura's new RDX shares much in idea with the TSX.

spin]Though|Although} one is an SUV and the opposite is a sports sedan, both autos are designed to blend sturdy efficiency with agility and exact handling. The distinctive positioning of this new Entry Premium SUV inside the Acura product line guided the event of a particular powertrain for the RDX. A standard 4-cylinder engine would lack the horsepower and torque wanted to make the RDX a strong performer. Then again, a 6-cylinder would add additional weight.

A perfect answer came in the type of a turbocharger - a primary for an Acura Florida Honda manufacturing vehicle. The RDX has an modern new variable circulate turbocharger that overcomes the shortcomings of standard turbo designs and delivers an unusually broad powerband with little or no lag in throttle response. In addition, Acura's turbo design offers this profit with excessive reliability. It's because airflow is managed before it enters the turbocharger, relatively than inside the turbocharger as in traditional variable-movement designs. Acura's variable movement turbo design thus eliminates transferring parts that work straight in the stream of sizzling exhaust gases.

Architecturally similar to the TSX's 2.4-liter in-line 4, the RDX applies a 2.three-liter DOHC sixteen-valve in-line four-cylinder engine. Like the TSX, the RDX uses i-VTEC® valve management that mixes Variable Valve Timing and Carry Used Cars Digital Control (VTEC®) with Variable Timing Management™ (VTC™). With the variable movement turbo working in unison with i-VTEC®, the RDX delivers sturdy power and torque, wonderful fuel economic system and very low emissions.

Rated output for the engine is 240 horsepower @ 6000 rpm and 260 lb-ft of torque @ 4500 rpm. That gives it the best torque output of any engine in the Acura lineup. The RDX is EPA rated at 17/22* metropolis/freeway mileage, which puts it forward of some much less highly effective SUV competitors.

*Primarily based on 2008 EPA mileage estimates, reflecting new EPA fuel financial system methods starting with 2008 models. Use for comparison purposes only. New Honda's Don't examine to fashions before 2008. Your actual mileage will vary depending on how you drive and maintain your vehicle.

2008 Acura RDX
Engine DOHC i-VTEC Turbocharged I-four
Displacement 2300cc (2.3-liter)
Compression ratio 8.8:1
Horsepower SAE web @ rpm 240 @ 6000
Torque SAE web @ rpm (lbs.-ft.) 260 @ 4500
Transmission 5-speed computerized
EPA estimated mileage City/Freeway 17/22*
Emissions certification (CARB/EPA) LEV II ULEV/Tier-2 Bin-5
Gas sort Premium unleaded
With its rear-mounted exhaust manifold feeding instantly into the turbocharger and the use of a close-coupled catalytic converter, the RDX uses its superior Programmed Gasoline Injection (PGM-FI) to fulfill strict CARB LEV II ULEV and EPA Tier-2 Bin-5 standards.

The RDX's 5-pace automated with Sequential SportShift can function as a traditional automatic transmission or, at the driver's Auto Specials option, be shifted manually via steering-wheel-mounted paddles. The electronically controlled Drive-by-Wire Throttle System™ and automatic transmission work together to execute shifts, leading to exceptionally quick and easy gear changes.

To maximise accessible traction with dealing with balance and responsiveness, the RDX comes commonplace with Tremendous Dealing with All-Wheel Drive™ (SH-AWD™). This all-wheel-drive system progressively distributes the optimum quantity of torque not only between the front and rear axles but in addition between the left and proper rear wheels. The system's direct yaw control helps cut back understeer, enhance steering accuracy and complete cornering power.

Engine

Turbocharged and intercooled 2.three-liter inline-4 engine, sixteen-valve DOHC i-VTEC®
240 horsepower at 6000 rpm
260 lb-ft of torque at 4500 rpm
i-VTEC® variable valve timing system
Variable flow turbocharger
Air-to-air intercooler
Mobil 1® synthetic oil
Oil-life monitoring system
Drive-by-Wire Throttle System™
Direct ignition system
Transmission and Drive System

Tremendous Dealing with All-Wheel Drive™ (SH-AWD™)
Sequential SportShift 5-velocity automatic transmission with F1®-style paddle shifters
Superior Shift-maintain Control and Grade Logic Control
Torque converter specifically designed to match turbo energy traits
Specifically tuned lockup clutch damper
Transmission fluid cooler
Noise, Vibration, and Harshness (NVH)

Twin chain-driven balance shafts mounted in oil pan
Maintenance-free silent-chain camshaft drive
Aluminum cylinder block with cast-in iron cylinder liners for mild weight and durability
Block and 1-piece aluminum crankshaft carrier for improved strength
Emissions/Gas Financial system

EPA licensed 17/22* mpg (city/highway)
Meets strict CARB ULEV-2 and EPA Tier-2 Bin-5 requirements
Rear-dealing with exhaust ports, aluminum exhaust manifold and shut-coupled catalytic converter present quick catalytic converter light-off
Jet-pump purge system captures evaporative emissions from the Schedule Service gasoline tank, directing emissions into the consumption system for correct burn-off
CRANKSHAFT, ENGINE BLOCK AND OIL PAN

The RDX utilizes an all-new turbocharged engine. The die-solid light-weight aluminum block has cast-in iron cylinder liners with 86mm bores. The block is a 2-piece design that fully helps the 5 major bearings with a single forged-alloy mattress-plate assembly to maximise the rigidity and reduce noise and vibration. For even higher rigidity, the oil pan is a stiff aluminum alloy die casting.

To handle the 20-% improve in horsepower and a 60-p.c enhance in torque output as a consequence of turbocharging, there are quite a few strengthening measures throughout the engine. The cylinder block has been strengthened and additional structural reinforcements stiffen the engine's mating surface with the transmission.

The RDX uses a cast-metal crankshaft with a long 99mm stroke. To reduce friction and improve durability, the crankshaft journals are micropolished. Special Order Parts forged connecting rods are engineered to deal with the engine's high power output. The RDX has special alloy pistons with thick crowns and super arduous Ni-P plating in the piston ring grooves to supply a protracted-sporting floor with additional heat resistance. A excessive-capacity oil pump supplies oil jets directed at the underside of the piston crowns to assist dissipate heat.

CYLINDER HEAD / VALVETRAIN

The RDX cylinder head is a low-stress aluminum alloy casting that options four valves per cylinder driven by dual overhead camshafts. Resulting from turbocharging, the compression ratio is ready at 8.8:1 and Premium Unleaded gas is required for best resistance to detonation. Valve sizes are 35mm consumption and 30mm exhaust, as Auto Finance in the TSX. An routinely adjusted silent-type cam chain is upkeep free and runs in an oil bath for optimum durability. For higher cooling, the RDX has small-diameter 12mm spark plugs (the TSX has 14mm plugs) with a long 26.5mm attain (the TSX has 20.5mm attain plugs). The added reach permits the cylinder-head coolant jacket to be larger, with more coolant volume for better cooling and detonation resistance.

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