2.4-liter i-VTEC Engine
The same powerplant found in the TLX sport sedan is in every ILX model. The aluminum block, direct-injected 2.4-liter inline-four delivers 201 high-revving horsepower, 181 lb. ft. of torque (both SAE net) and best-in-class thrills per mile. Unlike turbocharged engines, throttle response is immediately impactful while the engine’s light weight makes handling nimble and fuel efficiency notable.
- Intelligent Variable Timing and lift Control (i-VTEC®) increases horsepower by opening intake valves longer and deeper at approximately 4500 rpm and above. This high rpm airflow is further enhanced by Variable Timing Control that incrementally advances the opening of intake valves as rpm rises.
- Direct Gas Injection sends fuel directly into each cylinder through a multi-hole injector for a more precise, effective air/fuel mixture. In addition to added performance, this process significantly lessens fuel consumption at engine start.
- Fuel directly injected into a cylinder also has a cooling effect allowing power-increasing higher compression with no engine knocking.
- The engine’s rigid aluminum block reduces weight for improved handling.
- Reduced friction equals increased fuel efficiency. Here are a few ways it’s done on the ILX:
- Offset cylinders
- Low-tension piston rings
- Double-arm chain system
- Exclusive belt layout for EPS
- The Drive-by-Wire™ system supplies exceptional throttle response and driver feel when navigating challenging conditions.
- With an EPA Fuel Economy Rating2 of 25/ 35 / 29 mpg (city/highway/combined), the ILX is efficiently fun.
8-Speed DCT (Dual-Clutch Transmission)
All ILX models are equipped with the sophisticated 8-speed DCT transmission. Originally developed for racing, the dual-clutch design shifts faster, smoother and with greater efficiency than conventional automatic transmissions. Designed in-house, drivers will find it a perfect fit for the high-revving inline-four engine.
- Unlike a conventional automatic, the new transmission changes gears though clutches (much more like a manual transmission) rather than simply a torque converter.
- The transmission has one clutch for odd-numbered gears (1, 3, 5, 7) and a second for even ones (2, 4, 6, 8). While one clutch is engaged with the current gear, sensors predict whether the next gear change will be an upshift or a downshift. The second clutch then prepares the next gear ratio for engagement so when the shift occurs it’s instant with a negligible loss of engine torque.
- Eight gear ratios keep the 2.4-liter engine running at or near peak efficiency at nearly all speeds.
- Because dual-clutch transmissions have been known to shift roughly (particularly from a stop), Acura took the unprecedented step of maintaining a torque converter for a smoother launch.
- The true performance potential of this new 8-Speed DCT is brought out by paddle shifters that enable lightning fast shifts that take only milliseconds versus a typical driver’s manual shift of about a half second. Such quick-response shifting makes lively acceleration out of a turn or engine braking down a mountain road particularly satisfying.
Rigid Body Structure
Though not apparent to the naked eye, body structure is one of the best examples of what distinguishes the ILX from conventional cars of its size.
- Significant structural enhancements can be found at the frames around each door opening and across the rear of the trunk-lid opening.
- Other enhancements include reinforced joints and replacing multiple components with single components to smooth stress flow.
- Lateral flex has been reduced through strengthened joints around the front suspension sub-frame mounting.
- Close to 59% of the vehicle’s weight is made up of high-tensile steel, which is lighter and stiffer than conventional structural steel.
- Aluminum was used for the hood to reduce the center of gravity and at the bumper beams to reduce polar inertia, both of which improve handling.