The 2009 Acura TSX runs on a 2.4-liter inline-4 i-VTEC engine from Honda’s K-series family, delivering roughly 200–210 horsepower depending on transmission, and about 172 lb-ft of torque.
In detail, this second-generation TSX sticks with a refined, naturally aspirated four-cylinder setup designed to balance everyday usability with spirited performance. Available with either a six-speed manual or a five-speed automatic, the engine’s output and character shift slightly with the gearbox, but the core powerplant remains a 2.4-liter i-VTEC four.
Engine type and specifications
Below is a quick reference to the key characteristics of the 2.4-liter i-VTEC engine that powered the 2009 TSX.
- Displacement: 2.4 L (2364 cc)
- Configuration: Inline-4
- Valvetrain: DOHC with i-VTEC
- Fuel system: Sequential multi-point fuel injection (i-VTEC with standard fuel delivery for the K-series)
- Compression ratio: Approximately 11.0:1
Key specs at a glance:
Note: The exact engine variant and output can vary slightly by market and model year, but all 2009 TSX models share the core 2.4-liter i-VTEC four-cylinder foundation.
Performance figures and transmission options
To give a sense of the performance, here are the approximate figures and how the transmission choice can influence them.
- Horsepower: about 200–210 hp
- Torque: around 172 lb-ft
- Redline: roughly 7,000–7,400 rpm
- Transmission choices: 6-speed manual or 5-speed automatic
Performance ranges by transmission:
These numbers illustrate the overall character of the engine: a capable, smooth-revving four-cylinder that suits the TSX’s blend of daily driving and light-to-moderate spirited performance. Exact figures can vary by production year, trim level, and country.
Why this engine suits the TSX
The 2.4-liter i-VTEC is part of Honda’s reliable K-series lineage, known for solid low- and mid-range response, smooth power delivery, and proven durability. In the TSX, it provides a balanced personality—calm and refined for commuting, yet responsive enough to feel lively when the accelerator is pressed harder.
Summary
In short, the 2009 Acura TSX is powered by a 2.4-liter inline-4 i-VTEC engine from the Honda K-series, producing roughly 200–210 horsepower and about 172 lb-ft of torque, with either a six-speed manual or five-speed automatic transmission. The engine’s design emphasizes a smooth, predictable powerband suitable for daily driving with occasional spirited performance.