What engine is Acura TSX?
The Acura TSX uses a 2.4-liter inline-4 i-VTEC engine from Honda’s K-series family.
In North American TSX models, the engine was tuned differently across two generations: the first generation (2004–2008) used the K24A2 variant producing around 200 horsepower, while the second generation (2010–2014) used a refined 2.4-liter K-series engine (K24Z3) delivering about 201 horsepower and 172 lb-ft of torque. Both generations are naturally aspirated and front-wheel drive, with no V6 option.
Engine overview by generation
The two U.S. market generations of the TSX share the same basic 2.4-liter i-VTEC four-cylinder concept, but with different tuning to suit evolving performance and efficiency targets. The following brief snapshot highlights the main specs you’ll encounter when evaluating a TSX by year.
- First generation (2004–2008): 2.4-liter inline-4 i-VTEC (K24A2); approximately 200 horsepower and around 160–165 lb-ft of torque; front-wheel drive; naturally aspirated.
- Second generation (2010–2014): 2.4-liter inline-4 i-VTEC (K24Z3); about 201 horsepower and 172 lb-ft of torque; front-wheel drive; naturally aspirated.
Across both generations, the TSX remained a consequence of Honda’s reliable K-series approach: a sporty, efficient four-cylinder engine that avoided turbocharging or a V6 option, emphasizing smooth power delivery and duty-cycle reliability.
Engine codes and tuning
Engine codes like K24A2 (first generation) and K24Z3 (second generation) denote specific variants tuned for the TSX. The i-VTEC system adjusts intake and exhaust timing to balance performance and efficiency, contributing to the TSX’s reputation for responsive mid-range power without excessive complexity.
Summary
The Acura TSX’s engine lineup centers on Honda’s K-series 2.4-liter inline-4, with two generations delivering roughly 200 hp in the early models and about 201 hp in the later models. Both generations are naturally aspirated and front-wheel drive, underscoring the TSX’s focus on balanced performance, reliability, and daily drivability.
