S-4 vs S-5?
#1
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S-4 vs S-5?
I'm new, obviously. Can someone explain the difference between s4 and s5, is there an advantage to one or the other? How do I identify what I have?
#3
Sleeper but still slow
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S4 has black rubber trim and molding on sides and bupmers and it has 4 sectiontaillights. The s4 N/a has 140 something horsepower and the S4 turbo has 182 hp.
S5 has body colored trim and front lip is more aerodynamic, badging is plastic rather than sticker and MAZDA logo on front bumper is raised. The N/A has 160 hp and the turbo has less lag and 200hp as well as tailights with round bulbs under smoked lenses. The easiest way t tell is body, taillights and year. if it's pre 89 it's S4 and S% for years 89 and later.
S5 has body colored trim and front lip is more aerodynamic, badging is plastic rather than sticker and MAZDA logo on front bumper is raised. The N/A has 160 hp and the turbo has less lag and 200hp as well as tailights with round bulbs under smoked lenses. The easiest way t tell is body, taillights and year. if it's pre 89 it's S4 and S% for years 89 and later.
#4
The Power of Rotary
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How much Horsepower did my car come with from the factory?
At the Flywheel ratings:
86-88 NA = 146 HP @ 6500 RPM w/ 138 Ft/lb @ 3500 RPM
86-88 Turbo = 182 @ 6500 RPM w/ 183 Ft/lb @ 3500 RPM
89-91 NA = 160 HP @ 7000 RPM w/ 140 Ft/lb @ 4000 RPM
89-91 Turbo = 200-202 @ 6500 RPM w/ 196 Ft/lb @ 3500 RPM
Infini IV = 215 @ 6500 RPM w/ 206 Ft/lb @ 3500 RPM
86-88 S4
89-91 S5
At the Flywheel ratings:
86-88 NA = 146 HP @ 6500 RPM w/ 138 Ft/lb @ 3500 RPM
86-88 Turbo = 182 @ 6500 RPM w/ 183 Ft/lb @ 3500 RPM
89-91 NA = 160 HP @ 7000 RPM w/ 140 Ft/lb @ 4000 RPM
89-91 Turbo = 200-202 @ 6500 RPM w/ 196 Ft/lb @ 3500 RPM
Infini IV = 215 @ 6500 RPM w/ 206 Ft/lb @ 3500 RPM
86-88 S4
89-91 S5
#5
hmm.....let me start....s5, being the newer version obviously have more power....146 to 160 for NA and 182 to 200 on the turbo....the s5 benefits from newer chassie/lower miles.higher compression rotors/better turbo...stock anti flood features, but suffers from electronic OMP....plastic tie rod ends..and worst of all.....those damn mouse belts...the s4 are better in terms of overall simplicity....rtek if u wanna get a turbo and is generally cheaper to pick one up
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#8
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I have also been wondering about this while we're on the topic. Is there alot of differences between the wiring and ecu? Also, can you swap out the OMP from an s4? I'm thinking of s5in my s4 tII and most of the ones i find are with cut wiring harnesses so i'm trying to figure out how much of a pain it would be.
#10
King of the Loop
Originally Posted by t-too
I have also been wondering about this while we're on the topic. Is there alot of differences between the wiring and ecu? Also, can you swap out the OMP from an s4? I'm thinking of s5in my s4 tII and most of the ones i find are with cut wiring harnesses so i'm trying to figure out how much of a pain it would be.
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Sleeper but still slow
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Originally Posted by Jager
Some differences, the most noticable is the 9.4 (s4) to 9.7 (s5) compression ratios.
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Originally Posted by Sideways7
I think one of the easiest things to look for is the EGR valve. s4 has it, s5 doesn't.
(hopefully Icemark or someone else knowelegable can come up behind me and clear it out, but the above info may only apply to S5s built 1990 and later) I'm not a 100% sure but that would be the non technical persons easy way of identification.
#19
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Originally Posted by Jager
I guess I forgot to say I referring to NA's.
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Originally Posted by Jager
I guess I forgot to say I referring to NA's.
#21
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Originally Posted by '87 trubo FC
that and S5 intercooler says "intercooled rotary turbo" where the S4s have "13b intercooled turbo II" notice S4 doesn't have the word "rotary" on it's intercooler at all. also S5s weren't called turbo IIs just turbo
#22
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Originally Posted by t-too
I thought that it was just the jdm motors that said that.