nope i tend to disagree
yes on the paper it looks minor but on real world it make alot different
i own a saga 1.3 year 91 and a 1.5 same year too
the condition of the 1.5 is misarable , as in dying distributor , faulty carb , leaking compression and where 1.3 is in real mint condition , rebuild head , meaddled carb , new distributor , compression are intact
both servise with same oil , same part and in bone stock condition
both millage are in 160k and 150k
althought the 1.5 is beat up but it can win the 1.3 anytime anywhere
the speed that 1.5 can gain is way faster than 1.3 and the torque it had are way more than 1.3
the reason we feel 1.3 are on par its because its have lighter engine hardware inside so it will be more free revving
simple logic its has a smaller piston than 1.5

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Added on July 14, 2011, 8:39 pmbtw torque plays important parts in car performance
i still remember my dad used to own a pug 405 with converted gti 1.9 mi16 lump
on paper its have 155 horses
so its should lose out to honda's b series
but i remember its on par with it even it is b18c
but compare torque the b series have a pathetic figgure
its the torque that important in daily driving and european build their engine to have more torque rather than horsepower