Can anyone tell me what the main differences are between these 2 models?

 

Si has a different motor, sunroof, rear wiper......just off the top of my head.

 

si is heavier, has rear disc brakes, different interior

 

Discs on the back were not on all Si's, just the 90-91's as I recall.

Si's are going to have the black/charcoal interior, power sunroof, rear wiper & squirter. A rear defroster is also an option which most of them had, but could be had on the HF's and DX's as well. The Si's always had rear cargo covers and dividers wheras the HF's did not. More sound deadening was also to be found on the Si over the HF. The DX was the only CRX available with an automatic and all DX models were cursed with a horrible 2 injector intake, reminiscent of something the General would put on a mid 80's Camaro.

 

One of the main diffrences when doin a swap into it is the SPLINES in the hub asembley for the axles i think hf has 22 and si has 26or 27 dont remeber

 

yea, for swaps an HF needs either si or dx knuckles and hubs, also i htink the 88 and some 89 model HF's were dual point injections where as all Si's were multi point (granted were talkin about 88-91's) all in all an Si is the better stock buy in any case.

any other honda specific Q's should go to the tech forum or general car chat.

 

which is quicker? the si?

 

Stock for stock? Si hands down. The HF is a 54 fwhp beast in stock form with tranny gearing that is beyond autobahn spec. Ask Vapor (John) how far second goes to (mph wise) in a stock HF.

 

i was gonna go look at an HF tomorrow, guy wants 2500 for it, just wondering if i should even chance it

 

They are the lightest out there with the most potential when you do a swap. Just buy my Si for 6k and call it an afternoon. No messy motor swaps, just turn the key and burn.