How many hp do I need?

How many hp do I need?

Author
Discussion

Huntsman

Original Poster:

8,661 posts

263 months

Monday 5th May
quotequote all
Not been on 2 wheels since 2003 and now I want to commute to work on 2 wheels.

I rode for 20 years, lots of Lambrettas and Vespas, a FZR600, a Husky 410TE, VF1000F2 (loved that) and a Duke 750SS.

I dont much like anything modern or any kind of HD or retro thing.

I need narrow for working through traffic and I need to be able to overtake quickly and I dont want weight on my wrists (hated the FZR for that reason). It will need to live outside and cope with a lot of mud and water as we live rurally.

I'm a big lump.

I'm think Royal Enfield 450, but maybe not enough grunt.

Maybe a BMW R100.

Perhaps an old leaky British Twin.

Duke Monster.

I guess my question is how many hp do you need to be able to quickly overtake a car doing 30 to 40mph?

Mr Squarekins

1,269 posts

75 months

Monday 5th May
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I'd say about 80-85 is really fine.

I have 200 and it's really not necessary smile

But reading your requirement again, just about any of those would be fine bhp wise. 80+ is good for fast road overtakes.

If commuting or storing outside, something narrow and Japanese.

Edited by Mr Squarekins on Monday 5th May 17:11

KTMsm

28,591 posts

276 months

Monday 5th May
quotequote all
You can do it with less but most of the "first big bikes" like the MT07, ER6N etc are twins with 70ish bhp

Most find them fast enough to be fun and efficient overtaking at normal road speeds

Would need more info like budget and what roads / distance you commute to suggest specific bikes

croyde

24,599 posts

243 months

Monday 5th May
quotequote all
I dispatched in the 80s on various bikes in London but worked my way down in size and power to a Honda CB250RS with around 20bhp.

It's all you really need to be quicker than a car in traffic biggrin

Currently I ride a 65bhp Triumph Speed Twin. No one overtakes me in London traffic and it's far easier to ride in London than the 110bhp lighter Ducati that it replaced.

Before those it was a 20bhp Vespa 300, again the only things that overtook me, rarely biggrin, were bigger bikes.

Discendo Discimus

682 posts

45 months

Monday 5th May
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I have 1984 BMW R100RT which can overtake with ease, not so great at 70 plus but it'll manage easily enough.
I also have a KTM Superduke GT with about 170bhp which can overtake Elon Musk's next rocket as it passes through the clouds. Also plenty narrow enough to filter.


KTMsm

28,591 posts

276 months

Monday 5th May
quotequote all
croyde said:
I dispatched in the 80s on various bikes in London but worked my way down in size and power to a Honda CB250RS with around 20bhp.

It's all you really need to be quicker than a car in traffic biggrin

Currently I ride a 65bhp Triumph Speed Twin. No one overtakes me in London traffic and it's far easier to ride in London than the 110bhp lighter Ducati that it replaced.

Before those it was a 20bhp Vespa 300, again the only things that overtook me, rarely biggrin, were bigger bikes.
We clearly ride on very different roads - google suggests a vespa 300 has a 0-60 of 12 seconds, I haven't had a car that slow for 30 years

My old KTM 690 was a great bike in traffic being light and responsive, it does it sub 4 seconds




Alex Z

1,720 posts

89 months

Monday 5th May
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The automatic transmission on a Vespa GTS (or similar powered scooter) means they are very nippy to overtake around town speeds but tails off as you get to faster roads.

trickywoo

12,809 posts

243 months

Monday 5th May
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V Strom 650 would be perfect.

KTMsm

28,591 posts

276 months

Monday 5th May
quotequote all
OP asked about overtaking cars doing 40 quickly, which means you need to be doing at least 60 IMO

If you're just playing silly buggers in almost stationary traffic then the fastest is generally the one who cares the least for retaining their licence / life

TheInternet

4,985 posts

176 months

Monday 5th May
quotequote all
KTMsm said:
We clearly ride on very different roads - google suggests a vespa 300 has a 0-60 of 12 seconds
'In London' - 0-30 is pretty much all that matters and the CVT scooters tend to be pretty handy for that.

OutInTheShed

10,933 posts

39 months

Monday 5th May
quotequote all
Most of the cars you're going to overtake won't be racing you.
They might do 10s to 60 on paper, in reality, people mostly shuffle away from the lights and change into 2nd at 10mph, rather than hitting the red line in 1st.
It's quite easy to keep up with most modern urban/suburban traffic in a Morris Minor.
The 1% of drivers who are giving it stick 5% of the time are an exception you need to be prepared for.

Being used to a 1000c bike, it is a bit of a game change to ride a 30HP bike, but you just need to always be in the right gear to make progress, where a 1000 will stomp away at 2500 RPM, with a 30HP bike you need to be where the power is, if you want anything like 30HP.

When I'm riding my trail bike, it's quick enough around 'town', but on a road where you can do 60, I don't assume I will be quicker than all the cars, car drivers who are prepared to push on a bit around blind gravelly corners etc, will be all over you.

If pushed to name a number, I'd hazard 60HP is where it starts to get easy to be quicker than 99% of cars without playing tunes on the gearbox.

MDUBZ

1,018 posts

113 months

Monday 5th May
quotequote all
How far is the commute and what is the mix of roads like as you said you lived rurally and it needed to handle mud are we talking some single track to get to the house or just crap on the roads? and budget?

For motorway work i think between 120 and 150 is a broad sweet spot ( i have 65 miles each way), id happily do it on more of course; as a lump myself on anything with less than that and I've always felt it like it could do with more i have a monster with 115 after an up map but that's a bit tiresome on longer jaunts and the bars feel wide when filtering . For in town you don't really need much more than half that, something with a shorter wheel base will get you through the traffic.

Huntsman

Original Poster:

8,661 posts

263 months

Monday 5th May
quotequote all
To add a bit more, I'm on the Isle of Wight, its a 10 mile each way commute, mostly open single carriageway but the county town is half way and its a log jam I want to wiggle through.

The overtaking is on open roads, its mostly Hyundai i10's with ancient drivers dithering along.

Trevor555

4,656 posts

97 months

Monday 5th May
quotequote all
Huntsman said:
.

I guess my question is how many hp do you need to be able to quickly overtake a car doing 30 to 40mph?
A 29 Bhp scooter will do that.

Not much so after 60mph though.

Upright, comfy riding position.

An ADV350 has Showa suspension front & rear.

Had one as my daily transport for three years.

Understand that most "bikers" wouldn't be seen dead on one though lol

I also had a 750 SS many moons ago, wish I'd held onto that one.



Edited by Trevor555 on Monday 5th May 18:01


Edited by Trevor555 on Monday 5th May 18:02

Tango13

9,402 posts

189 months

Monday 5th May
quotequote all
'How much HP do I need?' is the wrong question, you should be asking 'How much torque do I need and where about in the rev range should it be?'

Croydes' Triumph twin has 80Nm/59 lbs/ft @ 3,800rpm which are the sort of numbers I'd be wanting for road use.


CoreyDog

809 posts

103 months

Monday 5th May
quotequote all
215 is of course the right answer…. https://www.autotrader.co.uk/bike-details/20250417...

My current bike has 60odd and is more than adequate for brisk overtakes, starts to run out of steam about 90mph though but if you are just commuting, won’t be needing to get to those speeds.

Bob_Defly

4,624 posts

244 months

Monday 5th May
quotequote all
80-100 torques and BHP.

bimsb6

8,391 posts

234 months

Monday 5th May
quotequote all
Not a lot overtakes my ktm 390 duke , it’s been my go to bike for the last year despite the garage housing a bimota sb6, a harley fxr , harley vrscr . 80mpg 100mph .

GreaseNipple

462 posts

254 months

Monday 5th May
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Most electric cars would beat a 30bhp scooter off the line, if an electric car really wants a gap in the traffic you need quite a powerful bike to get ahead

KTMsm

28,591 posts

276 months

Monday 5th May
quotequote all
Huntsman said:
To add a bit more, I'm on the Isle of Wight, its a 10 mile each way commute, mostly open single carriageway but the county town is half way and its a log jam I want to wiggle through.

The overtaking is on open roads, its mostly Hyundai i10's with ancient drivers dithering along.
Then I'd stick with 70 bhp ish if you want to enjoy riding which is the typical power for an average middleweight bike