Honda’s Bike With Four Wheels

When I first laid eyes on Honda’s Project 2&4 at the Tokyo Motor Show, I wasn’t thinking it would be worth a spotlight for the simple fact that it’s not a ‘new’ car. It made its debut at the Frankfurt Motor Show last month, and since then we’ve all heard the general story behind it.


But then I went in for closer look, and wow – I was impressed! The 2&4 may have been built as part of a Honda Global internal design competition, but believe me – this is not a fruitless styling exercise. With Honda’s new President, Takahiro Hachigo, being a sports car fan and wanting to get the Japanese automaker back into making exciting cars again, this sort of thing is promising to see. Aside from the fact that it’s unlikely to ever make it to production, everything about the 2&4 is a reflection of what Honda is good at.


Honda’s racing heritage is as diverse as it is long, and we are just beginning to see the fruits of a shift in focus with the S660 as well as the new Civic Type-R and NSX. Project 2&4 is best described as a four-wheeled bike; its extremely lightweight carbon construction and open-wheel design is combined with a street-tuned version of the RC213V 999cc V4 four-stroke competition engine. Power is rated at 215PS at 13,000rpm (the redline is at 14 grand), and drive is channeled to the rear wheels via a dual-clutch transmission.


The floating driver’s seat is just as extreme as the rest of the car and is there to further emphasise the thrill of a bike-like riding experience. It all hits the scales at 405kg, so I’ll let you do the math on the power-to-weight ratio of this thing.


Project 2&4 runs on conventional wheels and tyres and employs a bike-like braking system with small calipers, similar to what we’ve seen on Yamaha’s Sports Ride Concept.


The V4 engine sits low in the rear of the exposed chassis; everything combining for an extremely low center of gravity.


The suspension layout features double wishbones front and rear with race Öhlins upside-down coilovers at each corner.


It’s great to see such exciting cars coming from Japanese manufacturers again, and we can only hope this is the beginning of a whole new wave of great ‘made in Japan’ sports machines!

Dino Dalle Carbonare
Instagram: speedhunters_dino



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THIS IS BEAUTIFUL!!! Wait, why did I read this? Now I want one.

Well, Honda, you better make this.


AWD Turbo- Integra?
FR- Prelude?


Honda is an odd company to me these days. For a company that perfected simplicity in the motorcycle and automotive world, they seem HELL BENT on introducing complication!!! Then they give us this, that they will never build or sell. Ugh, it's frustrating. Why can't we just get a simple RWD Accord? Imagine how incredible the Accord would be if it was RWD!?! All else the same. Same motor, same styling (since they finally found the correct look again for the Accord, although it looks more like the ILX than ever - which is complicated and confusing all-in-one) - but seriously - this automaker is missing a simple RWD sedan. I gave up hope on a 2+2 S2000 years ago....... but imagine if we had it.... nobody would give a damn about a Toybaru

*opinions expressed by the rantings of an old man, who watched FWD Honda's DEFY PHYSICS, give a rebirth to the dying sport of drag racing in the 90's, and disregard the youth of that era by delivering crap cars for over a decade since, outside of the S2000 and NSX*


It's absolutely freaking awesome and I love it, but it makes me wonder what happens in a side crash..


I would love to see this go around a track just to see how well it would do


hcram39 Yup, me too. Looks great but doubt it would protect me in case of a t-bone.


Looks awesome, but why wouldn't they include the steering column?


hcram39 Probably a sign that it won't make it to production... sadly enough


An awesome car! Love take a spin in that along with the Atom and X-bow.


I like those wheels. what are they?


MPistol You seem to forget that Honda NEVER encouraged said physics denying FWD Hondas or designed them to do such. The FWD sport compact Honda craze was almost entirely a American derived - traditionalism be damned/lack of anything better to mod - movement. 

I remember living in Japan during that era and Japanese guys asking why Americans wasted time with FWD Hondas. Don't get me wrong. I like a mean, well done late 80s-mid 90s Civic/Integra, or even Accord Wagon as much as the next guy. But Honda has frankly been more about Engineering innovation directed towards difficult problems and efficiency than they ever were about performance. Frankly Honda historically is pretty indifferent to performance as a rule - similar to Toyota.Don't forget, the car that put Honda on the map around the world was the 70s CVCC.

I think the B-series engines and the american discovery of their adaptability and interchangeability within the different FWD economy chassis was more a 'perfect storm' type quirk of the era than anything else.

Unfortunately for us hard core enthusiasts; the best Honda seemed to muster was the S2000 and NSX. Both of which were eye openers, but hardly dominating in their niches. Although the original NSX redefined what should be expected of a "supercar" when it comes to reliability and refinement.


Im going to assume steer by wire


AmcMcm hcram39 Thats the price you pay for such a low weight.


very cool. 100% show car.


I like how they threw used tires on it to make it look like it actually drives.


It's there look closer


In the right direction, now make something like that for production, please.
Best ever integrated head and tail lights...if they work.


If it's a single seater, why not put the driver in the center? I dream of one day having access to an affordable center-seat car, as the only examples I know of are the F1 and the Mono.


Big Pooky cause the engine is next to the driver


The engine is at the back behind the seat. Its a detune version of the same engine Marc Marquez and Dani Pedrosa are using in Moto Gp is a really compact engine cause os a motorcycle engine. And is actually a two seater. The plastic or cover where the honda sticker is at the right is removable and a second seat is install.


Dino, we need the update of project GTR!!! Give it to us now, OR ELSE!!!!!?????

Or else, we'll just wait a bit longer... :D


I wonder if it uses the seamless gearbox that the RC213V runs! That would be mega. Sweet sounding V4.


While the idea sounds not really necessary on this vehicle. The seamless gearbox is great on 2 is need it to allow the riders to push hard while cornering. Without a seamless box you loose anywhere from half to a tenth of a second per sector. Because you end up slightly closing the throttle and picking up the bike in order to shift to the next gear...otherwise you upset the bike and end up fighting with it or worse crashing.
If you follow Moto Gp you can see what I mean perfectly with Espargargaro & Viñales. The Suzuki does not yet have a seamless gearbox...and this hurt them in they're lap times compare with Honda or Yamaha. Whatch the races today and pay attention to the body position of Honda & Yamaha compare with Suzuki guys. And you will see how they lift the bike a bit in the corners to upshift..
But still this vehicle has a great and a fast transmission. Also the engine is not really the same that Marquez and Pedrosa use. It is not Pneumatic Engine. But still is a hell of a engine.


EliThanos I don't think that the seamless is only about not closing the throttle, I mean, on a conventional motorbike gearbox you don't have to close the throttle when you shift up the gear due to its technology (even if it is not so good for the GB) and there are shifters that cut the injection for you when you change gears up. 

The seamless GB, if I remember correctly, allows to begin engaging the next gear while the current one is still running. This allows to have the next cogwheel running at the right angular speed.
Then the next gear is driven just a the moment that the current one is disengaged, giving no loss of traction to the wheel, gaining the last few milliseconds.

It basically does the same thing as a dual clutch transmission but with more efficiency and without adding too much volume.

Interesting technology but few information on the internet.


I don't think you understand me even do I try to explain as simple as possible. Have you ever ridden a bike with or without a quick shifter on a race track or on a road at all? Have you ever try to shift up while you are leaning on a bike and starting to get on the gas? Have you even try to get on the gas while leaning and see what happend? Im guessing Not. I have. In fact I have actually ridden Gp Bikes from moto2, moto3, BSB, WSBK and moto gp and many others as a test rider for various teams and manufactures, that's what I do for a living mate R&D Test Rider.
1) On a conventional bike you do have to close the throttle to up shift and downshift this action requires to use the clutch. Now a lot of sportbikes will actually upshift clutchless but only at a particular rpm and you do need to close the throttle a bit just enough so that you can engage the next gear. And that put stress on the gearbox they won't last if you do. That's why we have quickshifter.
2) Quickshifter on the market allow upshifts by momentarily cutting the ignition or the fuel. You still need the clutch lever for downshift that is why we as rider develops techniques like bleeping.
3) What I was explaining is that the seamless gearbox help the rider to smoothly shift up or down While Leaning. It was develop to solve that problem as a necessity since dual clutches, cvt etcs are banned in moto gp.
We are talking about high-precision mechanics here and I will not go into details. Many studies and patents are involved, every manufacturer owns their own system and their secrets are guarded closely. As a result, it is difficult to go into details about how they work, because each company only knows their own. The gearbox are never open in track only technicians in the factory are permitted to work and see it.
People keep believing that the seamless gearbox abbreviates dead time between one gear and another both in up and downshift, but the advantage is actually something else: the reduction of the ‘torque delta’. That means that with this system power delivery transfer from the engine between one gear and another is much smoother. The main effect is that at each gear-change the bike loses its composure less and remains more stable.
Rear suspension travel is regulated by various loads: first of all, the one that comes from the wheel but also from the pull of the chain. In changing gears the pull of the chain undergoes drastic variations in (torque delta), that is the amount of power that is transferred to the drive wheel.
If you are in 3rd, with the engine pulling at max. When you change into 4th, there is a moment in which the transfer of power is almost zero, as soon as the gear meshes together with 4th a big force is transferred from the pull of the chain to the suspension. Imagine you are at as I said in the first MSG at ( MAXIMUM LEAN), or in a quick change of direction, in influencing the suspension load, the pull on the chain drastically affects the stability of the bike. With the seamless on the other hand, you go directly from 3rd to 4th, (without any shaking). Clearly, it’s not simply a mechanical question, we also use electronic strategies capable of dulling the change in inertia of the power delivery between high and low revs, softening the extra torque that is produced in high-performance engines like those in MotoGP.
Now picking a tenth a lap in a 22 lap race cause you have a seamless and you are able to shift at full Lean angle smoothly that's 4.4 seconds.


EliThanos I think you need a new calculator there Rossi.  ^^


EliThanos Man you obviously are the best. I am a simple pedestrian while you are apparently a MotoGP Champion. 

Why be so condescending ? I was just trying to talk about an interesting technological device. Not show my massive ego.

Reading your 55 pages essay I just see that we agree completely on the subject. 

Anyway I won't debate any further, that just confirm what I thought about online commenting. 

That seems to be a great job you have, sincerely ! Hope you enjoy it man.

Oh and GO46 :-)


I never said that I was a Moto Gp Champ.
Anyways you know what. You are right big ego. So I sincerely apologize...I was not my intention to be a douche and I think I was. Not my best approach. Sorry bro.
Putting that aside...seems you are very interesting in the subject so I tell you what. If you really wanna know more. Send me a private msg via twitter. And I'll see what I can do depends where you are in the planet.


EliThanos No hard feelings man, don't worry, I worked as engineer/mechanic in the racing world (SSP French championship) and I still have connections ;-)

See ya on the tracks


this remind me of the 60's f1 cars


gdane I do wonder if the concept runs.


@turbo32 one offs for this concept


Preludacris Yes they did! Nice move, looked legit lol


koko san Yeah I liked those too


@Leonov34 Haha, it's coming I promise. Car being dropped off tomorrow to Do-Luck for the fitting of a small new addition before the whole shebang gets bolted in place ;)


Syko Yes and Honda sure made a lot of those


Suzuki had an interesting motorcycle engine transplant tiny track car that made th int. Car show circuit about 10 years ago.
And I think the same thing when I see this, put it in the catalog, or sell it as a kit.
Pure unfiltered awesome-sauce, don't touch it or breathe on it, please.
Soon to be in a vault type Honda museum, with other unicorns.


Syko It looks like Smokey Yunicks indy car.


Honda Ariel Atom 3.5 is that you?


the car was very good 
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