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2013 Civic Si vs FR-S

41K views 114 replies 46 participants last post by  mthk  
Glad I got the 2012 coupe, lightest of the bunch. Now slap on some Enkei 18x7.5 rpf01 plus 215/40r18 tires and claim even more loss power :D.
Did some number crunching...

Claimed curb weights:


2013 BRZ curb weight: 2,762 lb

2012 Civic Si coupe curb weight: 2,877 lb (+115 lb)
2012 Civic Si coupe w/navi curb weight: 2,897 lb(+135 lb)
2013 Civic Si coupe curb weight: 2,943 lb (+181 lb)
2013 Civic Si coupe w/navi curb weight: 2,966 lb (+204 lb)
2012 Civic Si sedan curb weight: 2,895 lb (+133 lb)
2012 Civic Si sedan w/navi curb weight: 2,971 lb (+209 lb)
2013 Civic Si sedan curb weight: 2,967 lb (+205 lb)
2013 Civic Si sedan w/navi curb weight: 2,992 lb (+230 lb)

Estimated peak wheel horse power and wheel torque:

BRZ: 200 bhp (~166 whp*) / 151 lb-ft (~123 lb-ft @ wheels)
Si: 201 bhp(~171 whp*) / 170 lb-ft (~143 lb-ft @ wheels)

*Estimates based on whp to bhp guestimator [sic]: Wheel Horsepower to Crankshaft Horsepower Guestimator

Peak wheel power to weight ratios:

1 short ton = 2000 lb

2013 BRZ: 120.2 whp/ton

2012 Civic Si coupe: 118.9 whp/ton (-1.3 whp/ton)
2012 Civic Si coupe w/navi: 118.1 whp/ton(-2.1 whp/ton)
2013 Civic Si coupe: 116.2 whp/ton (-4.0 whp/ton)
2013 Civic Si coupe w/navi: 115.3 whp/ton (-4.9 whp/ton)
2012 Civic Si sedan: 118.1 whp/ton (-2.1 whp/ton)
2012 Civic Si sedan w/navi: 115.1 whp/ton (-5.1 whp/ton)
2013 Civic Si sedan: 115.3 whp/ton (-4.9 whp/ton)
2013 Civic Si sedan w/navi: 114.3 whp/ton (-5.9 whp/ton)

Peak wheel torque to weight ratios:

2013 BRZ: 89.1 lb-ft/ton

2012 Civic Si coupe: 99.4 lb-ft/ton (+10.3 lb-ft/ton)
2012 Civic Si coupe w/navi: 98.7 lb-ft/ton (+9.7 lb-ft/ton)
2013 Civic Si coupe: 97.2 lb-ft/ton (+8.1 lb-ft/ton)
2013 Civic Si coupe w/navi: 96.4 lb-ft/ton (+7.4 lb-ft/ton)
2012 Civic Si sedan: 98.8 lb-ft/ton (+9.7 lb-ft/ton)
2012 Civic Si sedan w/navi: 96.3 lb-ft/ton (+7.2 lb-ft/ton)
2013 Civic Si sedan: 96.4 lb-ft/ton (+7.3 lb-ft/ton)
2013 Civic Si sedan w/navi: 95.6 lb-ft/ton (+6.5 lb-ft/ton)
 
I think that's why Honda was forced to retune its engine for 4 more hp to overcome the gained weight.
MugenSi,

I took the curb weight off emunds.com which listed the same weight for the '12 and '13 sedans. I'll update the post.

I'm quite dismayed that the car gets heavier each year. The '14 models surpass the 3000 lb mark.