What kind of engine is in an Acura TSX?
The Acura TSX uses a 2.4-liter inline-four engine from Honda’s K-series family, delivering roughly 200 horsepower depending on model year. Early cars relied on the K24A2 variant, while later models used updated K-series versions such as the K24Z1.
Engine family and generations
The TSX's powertrain is a 2.4-liter i-VTEC four-cylinder that powered every TSX from its debut through the end of its run. Over its life, Honda tweaked the variant numbers, but the basic architecture remained a four-cylinder, inline, dual overhead cam design with variable valve timing.
Below is a concise breakdown of the engine configurations that appeared in the TSX across its production run.
- 2004–2008 TSX: 2.4-liter DOHC i-VTEC inline-4, K24A2; typically around 200–205 hp and about 160 lb-ft of torque, with output differing slightly by transmission.
- 2009–2014 TSX: 2.4-liter DOHC i-VTEC inline-4, variants such as K24Z1/K24Z3; typically around 201–205 hp and about 172 lb-ft of torque, with minor differences by trim and transmission.
Note: Power figures can vary by market, model year, and whether the car had a manual or automatic transmission. Always consult the VIN-specific specs for exact numbers.
Technical notes and tidbits
The TSX's engine is part of Honda's widely used K-series family, known for responsive high-rev performance and strong reliability across many models beyond the TSX.
What this means for drivers
For buyers and current owners, understanding the engine helps with maintenance planning, parts compatibility, and performance expectations. Regular oil changes, timing chain upkeep, and listening for unusual noises can help keep the engine in good shape. The engine is paired with both manual and automatic transmissions, with some minor differences in output and feel depending on the drivetrain.
Summary
The Acura TSX is powered by a 2.4-liter inline-4 from Honda's K-series family. Across its production years, the TSX used K24A2 in the early models and later K24Z1/Z-series variants, delivering roughly 200–205 hp with torque around 160–172 lb-ft. The core design emphasizes a balance of performance and reliability, with variations primarily tied to generation and transmission choice.
