Does the Acura TSX have VTEC?
The Acura TSX uses Honda’s i-VTEC variable valve timing system on its 2.4-liter four-cylinder engine.
Understanding VTEC in the TSX
VTEC stands for Variable Valve Timing and Lift Electronic Control. In the TSX, Honda implements i-VTEC, which integrates variable timing with lift control on the intake valves. This design aims to deliver strong mid-range torque and good high-end power while maintaining fuel efficiency.
Intake-cam i-VTEC vs. exhaust behavior
In i-VTEC implementations found in the TSX, the system primarily varies the lift of the intake valves. The exhaust cam timing is not typically actively varied in the same way, though calibration can influence overall breathing at different speeds. This setup is common across K-series variants used in the TSX.
Engine generations and VTEC configuration
The TSX used two main generations in the United States, both with i-VTEC on a 2.4L K-series engine. Each generation uses different engine codes but retains i-VTEC for intake-valve lift control.
- 2004–2008: 2.4L K24A2 engine with i-VTEC on the intake valves.
- 2009–2014: 2.4L K24Z3 (and related K24Z variants) with i-VTEC on the intake valves.
In both cases, the system provides a balance of daily usability and spirited performance, aligning with Honda’s approach to VTEC-equipped engines.
Summary
Yes. The Acura TSX features i-VTEC on its 2.4L four-cylinder engines across both generations (2004–2008 and 2009–2014). The system enables variable intake-valve lift to enhance mid-range torque and overall efficiency, making VTEC a core characteristic of the TSX’s driving experience.
