Does the 2009 Acura TSX have VTEC?
Yes. The 2009 Acura TSX uses Honda's i-VTEC variable valve timing system on its 2.4-liter inline-four engine, configured on the intake cam rather than as a full dual-VTEC setup on both cams.
The TSX, in its 2009 iteration, continues Acura’s tradition of integrating VTEC technology into a refined, practical sedan. This article explains how that technology presents itself in the engine and what it means for performance and daily driving.
VTEC in the TSX explained
In the 2009 TSX, i-VTEC engages the intake cam to switch to a higher-lift, longer-duration profile at higher engine speeds. There is no VTEC on the exhaust cam in this configuration—it's not a dual-VTEC engine.
Before listing the key facts, here is a concise overview of what this means for the car's performance and behavior.
Key facts about the TSX's VTEC setup:
- Engine: 2.4-liter inline-four from Honda's K-series family with i-VTEC on the intake cam.
- VTEC function: Activation on the intake cam to provide more power at higher RPMs.
- Exhaust cam: No VTEC engagement; the engine relies on intake-side i-VTEC for performance gains.
- Driving impact: Helps deliver a broader and more usable powerband without compromising low-RPM smoothness.
In short, the 2009 Acura TSX uses i-VTEC on the intake cam, not a dual-VTEC system.
Model-year context
Engine and design notes for the 2009 TSX
As part of the second-generation TSX lineup, the 2009 model carries forward Honda's VTEC philosophy in a refined package centered on a 2.4-liter i-VTEC engine designed for a balanced blend of performance and refinement.
Summary: The 2009 Acura TSX uses i-VTEC on the intake cam of its 2.4L engine; there is no dual-VTEC on both cams, so it is not a full VTEC engine.
