Instructables

Electric car 3 times more efficient than a Prius

OptaMotive is working on the E. Rex, an electric three-wheeler that goes 0-60 in under 5 seconds, is three times as efficient as a Prius, and has a range of 100 miles. The focus is on the driving experience, though, and there's barely enough room for the driver and passenger, much less a couple more friends or some groceries in the trunk. OptaMotive is predicting a top speed of 160 mph, but hasn't had a chance to test that out yet.

Right now the car is in the testing phase so there's little chance of getting to drive it any time soon. If it does go on sale it's likely to cost over $50k, making the Prius a hell of a deal in comparison.

Check out the link for much more info.

E. Rex Is a 3-Wheeled Electric Hooligan


Picture of Electric car 3 times more efficient than a Prius
Wow, is that even safe to drive?
Dboye821 year ago
What was discovered first electricity or oil? Vehicles are to expensive as it is and there a borderline necesity in todays society, so why is it then we can build probes and what not that travel light years from Earth and space machines that transform and dock with eachother precicely but we can't build an Earth vehicle thats non paluting and still performes the same basic over all function of todays vehicles.. It just makes no sense to me at all that the governments don't put as much effort into the basic fundamentals of life and daily commute as they do building devistation weapons of mass destruction. Why is death more important then life?
Your under the assumption that the government has your best interest or even that of the planets, at heart. Check out "The story of your enslavement" on you tube. It is up to us, individually to make a change. Ride your bicycle, grow a garden, collect your own rain water, make your own energy.
KentsOkay4 years ago
 Ehh, folks are swinging the wrong way with electric cars for the most part. MOST companies are building 100 grand super cars, experimental cars, or other crazies like this. THINK CHEAP AND SMALL... THINK VEEDUB BUG!!
>cough<

They build the high-end cars first because that's what gets noticed. And Tesla is eventually coming out with the Model S, which is supposed to be more like $40,000--still high-end, but a lot more people can spend $40k on a four-seat luxury sport sedan than will spend $120k on a two-seat sports car. Which are you going to put on the cover of your magazine, a Karma or your neighbor's beat-up Bug?
This year. Saw an add for the Tesla S in this month's National Geographic! BTW, the bump isn't really my fault -- blame the math whiz.
:O Augh, I won't be home for another week, and my dad was kind enough to email me about the latest NGM that he has and I don't...he'll mail me an ad for a $1400 pocketknife but not a magazine.

I have to say, the Model S is a beautiful car, it's like a four-door Maserati GranTurismo, but I'd still rather have an Aptera 2h. If they ever get around to building the darned things...
...your library doesn't even subscribe to National Geographic?

(If that is the case, may I suggest, Sir, that you have a crappy library?)
 yes, yes I know about the Model S. 40 grand is still WAY out of the price range. I'm talking 20 thousand here maybe. I'm pretty sure the Nissan Leaf is supposed to fill that slot. Havent heard of e volks though. PERSONALLY, I'd take the Tesla over the Karma.
radartgb3 years ago
OK i am going to explain why you should not buy a Prius, so bear with me. The Prius gets 50 mpg, so if you keep the car for 200,000 miles you will have used about about 4000 gallons of gas, which is about $11,600 of gas at $2.90 a gallon. Now if you buy a car that gets 30 mpg and you keep it for 200,000 miles you will have used about 6666 gallons of gas, which is about $19,333 at $2.90 a gallon, so you have a savings of about $7733 for the Prius, sounds good right? Now heres the kicker, take the MSRP of a Prius 2 (the base model cheapest package) which is $22,800 and subtract $7733 and you get $15,067, that is your cut-off price to buy a normal car. That is easily achievable for a similarly equipped car of that size. Some examples would be like the Honda fit, the ford focus, Mitsubishi Lancer DE,Hyundai Elantra GLS, or the Toyota yaris. That and the price for repairs of a non-hybrid will be far cheaper than that of a hybrid one. most mechanics that i know won't even touch a Prius. Now if you to really want to save some dough, do like kentsOkay said and buy a VW bug or super beetle or something.
the main purpose of a prius (or any hybrid) isn't to save money on gas, it's to not use gas in the first place to reduce emissions into the atmosphere.

obviously not spending as much money on gas is an added benefit but it's not the primary function of developing a hybrid or electric car.
radartgb3 years ago
but just to be clear i think that this project of yours is way cool, i just had to put in my 200000 cents on the whole prius issue.
It's not Ed's project. He posted this as a link to somebody else's project. It's great that you wanted to demonstrate your math skills (Consumer Reports has made the same analysis), but it might also be useful to demonstrate your reading skills.
duly noted
RelientOwl4 years ago
Well I hope it at least has a crash test rating of 2 stars
=SMART=4 years ago
The Prius is a really really really environmentally unfriendly car.
fungus amungus (author)  =SMART=4 years ago
[citation needed]
No citation here, but I've heard that a Prius will actually get better mileage with all of the electric components removed. The real source of their efficiency is the tiny sub-100hp engine they pop in there--the hybrid components are really just to boost acceleration. Same reason an older Geo Metro can get over 50mpg.
You've been reading way too many Wikipedia articles ;->
ELF kelseymh4 years ago
Or xkcd :P
http://xkcd.com/285/

But yea, citation needed... We all heard about the problems with the prius' production and disposing of, when it comes to being green, but is it really that bad, compared to the amount of fuel consumed during it's "lifetime"?
JavaNut13 ELF4 years ago
Who hasn't read too much xkcd?

Will
*raises hand*
Kryptonite ELF4 years ago
Oh no! I thought I read every single comic strip last weekend, but I missed that one!
Not sure what the original poster had in mind but in a test on UK TV programme 'Top Gear' (admittedly not very scientific) a Prius and a BMW were both driven hard, with the BMW coming out with better fuel consumption. The point being its not just what you drive, but the way you drive it.
n0ukf4 years ago
Now, what can they do to build something suitable for winter weather? How much of your driving range would be used up by a heating system?
fozzy134 years ago
I absolutely love how those T-rexs look, I think a hybrid would be more practical, but maybe that's why I'm not a motorcycle/car engineer, at least not yet.. : )
DJ Radio4 years ago
Well at least these people will probably make sure it doesn't have brake problems.
Zem4 years ago
 Woah! Is that the brother of the T Rex?
fungus amungus (author)  Zem4 years ago
It's built off of a T Rex. Thus the name.
 Ahaa, so thats why I recognized the car shape.
kelseymh4 years ago
There has developed quite the industry in these sorts of three-wheeled "experimental" vehicles.  In the U.S., three-wheelers are regulated as motorcycles, not as cars, and therefore are not required to have anything even approximating "safety equipment".  You'll be lucky to get seat belts, let alone anything that can stand up to a collision with a real car.

The advantages for the developers are obvious.  Less safety equipment means lower weight, and so higher efficiency.  No requirements on body-panel strength or stability means you can use ultra-lightweight composites to get awesome aerodynamics, without the drag (pun intended) of something that can take a ding without shattering.

These are great demonstration vehicles, and probably wonderful for small town point-to-point driving (Davis, California has it's own electric car dealership, with dozens of golf carts, Cushmans, and whatnot tootling around town).  I would be terrified (now that I'm over 40) to take something like this onto an L.A. freeway, or even through downtown Manhattan.
If it has no reverse gear, it's a motor bike, no matter how many wheels it has.

If it has more than two wheels, you don't need a helmet.

And if you don't like this, you'll never make a Mini driver... ;-)
If it has more than two wheels, you don't need a helmet.
Unless if you're in a few select U.S states (like Ohio).

So technically, if I disabled to reverse gear (somehow) in my car, I would then own a motorbike (technically)?
I'm talking about the UK.
Interesting rule for the gearing.  Thanks!
In the UK Reliant used to make 3 wheelers (1 front, 2 back layout) which you still see around and Morgan used to make neat ones with 2 front/1 back layout.


jeff-o4 years ago
Looks cool!  If I ever come upon a large sum of money, I'd get one.

I am, however, currently entrenched deeply in minivan territory.
rgross4 years ago

hopefully this e-rex has no braking problems like the prius.

Koosie4 years ago
Interesting, looks like an electric Can Am Spyder, but with a roof.


can-am-spyder-large-1.jpg