My 2008 Civic Si Coupe was a great car; but it was just a college car. It was fast, quick on its feet, had an amazing audio system, and popular with the teenage and young-twenties crowd, but it always felt unrefined. The engine provides a surprising bit of power, but only high in the rpm's, and had no down-low power. Driving it in stop-and-go traffic was a chore due to very low torque, but once you got in the 6,000 to 8,000 rpm range, it FLEW. This car is an amazing college vehicle, especially with the standard sunroof and subwoofer, but it's just unrefined. Lots of wind noise, road bumps, and interior quality hiccups (such as a ticking CD-player) prevent it from being a "professional" car.
Amazing handling, rev-happy engine, standard subwoofer and sunroof, great power-to-weight ratio, probably the most fun to drive out of any car I have ever owned.
More torque, more focus on interior quality, more sound deadening (reduce road noise), improve fuel economy (it only gets about 23mpg on premium-required fuel)
2nd worst automotive decision I've made was to sell my 2008 Si (worst was buying a 2000 Mercedes E-class for the wife). In 3 years and 75,000 miles of ownership, it was gas, oil, go. That's it. Never once did it darken the dealer service bay for anything. Window sticker says 29mpg highway and that is WAY underrated. I easily got 34-35 with the cruise set on 70, and that was with 10% ethanol fuel. Real gas gave me as high as 37mpg once. With the HFP suspension and Michelin Pilot Sports, this was the best handling car I've ever owned. Other cars may be faster (GTI, WRX, Mazdaspeed 3), but the Si is absolutely THE BEST blend of comfort, performance, reliability and economy.
Great little all around car. So far I've driven 8000 km. What I love most is the engine and super smooth clutch and transmission. The I-vtec is peppy paired with limited slip diff and summer tires. It loves high rpm reminds me of a sport bike. Car handles very well with little body roll. Makes an excellent commuter car if your looking for something more fun to drive than your typical Civic dx/lx/ex etc. It needs 91oct and I've been averaging 28-29 mpg mostly highway driving somewhat aggressive. The car looks great cosmetically in coupe form compared to other cars in its class. But lacks acceleration to keep up with its competition.
-Smooth Clutch/Trans -Si racing seats and black/red trim interior -Limited Slip Differential -7 speaker sound system -and of course that sweet engine note from the K20Z3 engine! Exhaust sounds decent as well for stock.
- Acceleration could be improved. its Heavier than previous Si models. Could use more torque and horsepower. -Paint quality(chips and scratches very easily. Mines Rally Red) -Clutch/trans at times is touchy. likes to over-rev during aggressive shifts.