The short answer
Based on available data, the BMW 3 Series comes out ahead of the Acura TSX on fuel economy and power. Check the specs table and owner sentiment below for the full comparison before deciding between the two. Both are covered by real owner reports on CarWizz.
Overall
Overwhelmingly enthusiastic sentiment for legendary sport sedan regarded as Honda's finest achievement, praised extensively for timeless elegant styling aging gracefully 15-20+ years later, bulletproof K24 engine enabling routine 200,000-300,000+ mile operation (documented examples exceeding 525,000 miles), engaging driving dynamics balancing sportiness and comfort creating "fast go-kart" sensation, perfect compact size filling gap between Civic and Accord, exceptional build quality with vault-like door closing feel (Japan-built VIN "J"), excellent manual transmission option (6-speed creating enthusiast following), affordable maintenance with Honda parts availability, and unique luxury features unavailable in mainstream Honda products. However, criticism includes weak low-end torque requiring high RPM driving (VTEC engagement 6,000 RPM), cramped rear seat legroom, expensive 1st generation parts (steering racks, power steering pumps, alternators not shared with US models), door speaker failures requiring aftermarket replacement, oil consumption issues (2009-2014 models), poor fuel economy versus modern standards (22-25 MPG combined typical), soft Honda paint with clear coat failure, and chronic rocker panel rust (Canada/salt belt climates). Overall consensus: 1st generation 6-speed manual (2004-2008, especially 2007-2008 facelift with upgraded K24A2 engine) represents ultimate driver's TSX achieving cult status, while 2nd generation (2009-2014) offers more refinement and features though less engaging dynamics.
Best version to buy
1st Generation 6-Speed Manual (2007-2008 facelift) The 2007-2008 facelift years with upgraded K24A2 engine (203 hp versus 200 hp pre-facelift), revised cylinder head design adding 5 hp/torque, 6-speed manual transmission, improved interior materials, steering wheel controls, power passenger seat, resolved early production issues (AC condenser, alternator, starter reliability improved) represent ultimate TSX specification. Manual transmission transforms driving experience enabling full engine exploitation and eliminating automatic transmission whining.
Known issues
Overall
Sentiment is generally positive, with the 3 Series consistently praised for its driving dynamics, handling, and performance, particularly in higher-powered variants like the 330i and M340i. The vehicle is described as fun to drive, with great steering, brakes, and a stable, planted feel. However, owner feedback is heavily segmented by generation and engine choice.
Best version to buy
For the F30 generation (approx. 2012-2019), the 330i is specifically recommended as an "amazing daily." For the G20 generation (2019+), the M340i is highlighted as a "clear winner" and a top "grown-up performance vehicle," with its B58 engine frequently praised. There is a strong consensus to avoid underpowered base engines (e.g., 316/318) and to prioritize the M Sport trim for improved aesthetics and steering wheel.
Known issues
The verdict
The BMW 3 Series is the better choice for most buyers.
It has better fuel economy on its best-equipped version than the Acura TSX, based on the data above. If power matters more to you than running costs, the Acura TSX is worth a closer look instead.
Other comparisons
Not sure which one fits you?
Answer a few questions and get a personalized recommendation.
Which is more reliable, the Acura TSX or the BMW 3 Series?
Owner reports show similar reliability sentiment for the Acura TSX and the BMW 3 Series. Check the known issues listed above for specific differences between the two.
Which is better for families, the Acura TSX or the BMW 3 Series?
Data on family-specific factors like cargo space is limited for one or both models, but based on available reports, both are positioned as practical daily drivers. Check the specs table above for seating and body type.
Which has better fuel economy, the Acura TSX or the BMW 3 Series?
The BMW 3 Series is more fuel-efficient on paper: 7.5 L/100km combined versus 10.2 L/100km for the Acura TSX, based on the best-equipped catalogued version of each.
Which is cheaper to maintain, the Acura TSX or the BMW 3 Series?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the BMW 3 Series than the Acura TSX. See the known issues comparison above.