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spin]Though|Although} one is an SUV and the opposite is a sports activities sedan, both vehicles are designed to blend sturdy performance with agility and precise handling. The distinctive positioning of this new Entry Premium SUV within the Acura product line guided the development of a special powertrain for the RDX. A standard 4-cylinder engine would lack the horsepower and torque wanted to make the RDX a robust performer. On the other hand, a 6-cylinder would add extra weight. A perfect resolution came in the form of a turbocharger - a primary for an Acura Florida Honda production vehicle. The RDX has an revolutionary new variable circulate turbocharger that overcomes the shortcomings of typical turbo designs and delivers an unusually broad powerband with little or no lag in throttle response. In addition, Acura's turbo design offers this benefit with high reliability. It's because airflow is managed before it enters the turbocharger, quite than within the turbocharger as in conventional variable-stream designs. Acura's variable circulate turbo design thus eliminates moving components that work instantly in the stream of hot exhaust gases. Architecturally just like the TSX's 2.four-liter in-line 4, the RDX applies a 2.three-liter DOHC 16-valve in-line 4-cylinder engine. Like the TSX, the RDX uses i-VTEC® valve control that combines Variable Valve Timing and Raise Used Cars Electronic Control (VTEC®) with Variable Timing Control™ (VTC™). With the variable circulation turbo working in unison with i-VTEC®, the RDX delivers robust energy and torque, glorious fuel economic system and really low emissions. Rated output for the engine is 240 horsepower @ 6000 rpm and 260 lb-ft of torque @ 4500 rpm. That provides it the very best torque output of any engine in the Acura lineup. The RDX is EPA rated at 17/22* city/highway mileage, which puts it ahead of some much less powerful SUV competitors. *Primarily based on 2008 EPA mileage estimates, reflecting new EPA gasoline economy strategies starting with 2008 models. Use for comparability functions only. New Honda's Do not evaluate to models before 2008. Your actual mileage will range relying on the way you drive and preserve your vehicle. 2008 Acura RDX Engine DOHC i-VTEC Turbocharged I-4 Displacement 2300cc (2.three-liter) Compression ratio 8.eight:1 Horsepower SAE web @ rpm 240 @ 6000 Torque SAE internet @ rpm (lbs.-ft.) 260 @ 4500 Transmission 5-speed automated EPA estimated mileage City/Highway 17/22* Emissions certification (CARB/EPA) LEV II ULEV/Tier-2 Bin-5 Fuel type Premium unleaded With its rear-mounted exhaust manifold feeding instantly into the turbocharger and using a close-coupled catalytic converter, the RDX makes use of its superior Programmed Fuel Injection (PGM-FI) to satisfy strict CARB LEV II ULEV and EPA Tier-2 Bin-5 standards. The RDX's 5-velocity computerized with Sequential SportShift can function as a standard automated transmission or, at the driver's Auto Specials possibility, be shifted manually by way of steering-wheel-mounted paddles. The electronically controlled Drive-by-Wire Throttle System™ and automatic transmission work collectively to execute shifts, leading to exceptionally fast and easy gear changes. To maximize obtainable traction with handling steadiness and responsiveness, the RDX comes commonplace with Super Dealing with All-Wheel Drive™ (SH-AWD™). This all-wheel-drive system progressively distributes the optimum quantity of torque not only between the entrance and rear axles but in addition between the left and proper rear wheels. The system's direct yaw management helps reduce understeer, enhance steering accuracy and complete cornering power. Engine Turbocharged and intercooled 2.three-liter inline-four 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 circulation 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 Handling All-Wheel Drive™ (SH-AWD™) Sequential SportShift 5-velocity automatic transmission with F1®-fashion paddle shifters Superior Shift-hold Control and Grade Logic Control Torque converter specifically designed to match turbo power characteristics Specially tuned lockup clutch damper Transmission fluid cooler Noise, Vibration, and Harshness (NVH) Dual chain-pushed balance shafts mounted in oil pan Upkeep-free silent-chain camshaft drive Aluminum cylinder block with cast-in iron cylinder liners for light weight and sturdiness Block and 1-piece aluminum crankshaft provider for improved energy Emissions/Gasoline Economic system EPA licensed 17/22* mpg (city/freeway) Meets strict CARB ULEV-2 and EPA Tier-2 Bin-5 standards Rear-dealing with exhaust ports, aluminum exhaust manifold and close-coupled catalytic converter provide fast catalytic converter light-off Jet-pump purge system captures evaporative emissions from the Schedule Service gasoline tank, directing emissions into the consumption system for proper burn-off CRANKSHAFT, ENGINE BLOCK AND OIL PAN The RDX makes use of an all-new turbocharged engine. The die-solid lightweight aluminum block has cast-in iron cylinder liners with 86mm bores. The block is a 2-piece design that totally supports the 5 main bearings with a single cast-alloy bed-plate meeting to maximize the rigidity and minimize noise and vibration. For even higher rigidity, the oil pan is a stiff aluminum alloy die casting. To deal with the 20-p.c improve in horsepower and a 60-percent improve in torque output on account of turbocharging, there are quite a few strengthening measures all through the engine. The cylinder block has been reinforced and additional structural reinforcements stiffen the engine's mating surface with the transmission. The RDX makes use of a solid-metal crankshaft with a long 99mm stroke. To reduce friction and improve sturdiness, the crankshaft journals are micropolished. Special Order Parts cast connecting rods are engineered to deal with the engine's high power output. The RDX has special alloy pistons with thick crowns and super onerous Ni-P plating in the piston ring grooves to offer a protracted-sporting floor with additional heat resistance. A excessive-capability oil pump provides oil jets directed on 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 features four valves per cylinder driven by twin overhead camshafts. Attributable to turbocharging, the compression ratio is ready at 8.eight:1 and Premium Unleaded gasoline is required for finest resistance to detonation. Valve sizes are 35mm consumption and 30mm exhaust, as Auto Finance in the TSX. An mechanically adjusted silent-kind cam chain is upkeep free and runs in an oil tub for optimum durability. For higher cooling, the RDX has small-diameter 12mm spark plugs (the TSX has 14mm plugs) with an extended 26.5mm reach (the TSX has 20.5mm reach plugs). The added reach allows the cylinder-head coolant jacket to be larger, with extra coolant quantity for better cooling and detonation resistance.
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