Three Cylinders, No Apologies

There is a particular sound a valet makes when an i8 pulls up, and it is not the sound they make for a 911. The 911 gets a nod. The Ferrari gets a wince, because they know about the nose lift and the ticket book. The i8 gets a pause — a half-second of genuine computation while a person who parks exotic cars for a living tries to work out what he is looking at. Then the doors go up, and the computation stops, and he just watches.

I have never seen that reaction cost less money than it costs right now.

That is the whole article, really, and if you want to stop reading and go open a search tab, I understand. But there is a longer version, and the longer version has a knife in it, because the i8 Roadster is simultaneously one of the great bargains in modern car buying and one of the easiest ways to lose fifteen thousand dollars in a single phone call with a service advisor. Both things are true. Anyone who tells you only the first thing is trying to sell you one.

What It Was Supposed to Be

Rewind to 2014, when BMW was doing something no other legacy manufacturer had the nerve to do. It built an entire sub-brand — a letter, a factory, a supply chain — around the premise that the sports car was going to survive the twenty-first century by getting smarter rather than louder. The i3 was the practical argument. The i8 was the seductive one.

Underneath the theater is a genuinely radical piece of engineering. The passenger cell is a carbon fiber reinforced plastic tub — BMW called it the Life Module — bolted to an aluminum Drive Module carrying the batteries and the powertrains. Plural. There is a 1.5-liter turbocharged three-cylinder behind your head driving the rear wheels through a six-speed automatic, and an electric motor up front driving the front wheels through a two-speed. Depending on what you ask of it, the car is rear-drive, front-drive, or all-wheel drive, and it changes its mind about that several times a mile without telling you.

The result weighs about 3,500 pounds while carrying two complete drivetrains and a battery pack. In 2014 that was witchcraft. In 2026 it is still a better weight figure than most electric sedans manage carrying one.

The Verdict the World Reached

It went badly. Not commercially — 20,465 cars over six years is a respectable run for something that cost the better part of a Bentley — but critically, in the specific way that matters to the people who set used values.

The complaint was always the same, and it was always fair. You look at the i8 and your body prepares itself for something. Then you press the accelerator and the car does 0 to 60 in 4.4 seconds, which is quick, which is not the same as what the shape promised. The Drive called it the prettiest walking fish in the automotive world, which stung because it was accurate. A contemporary Acura NSX had 573 horsepower and did the same sprint in under three seconds for less money. A Tesla Model 3 Performance embarrassed it at every light in America, and did so while carrying a family.

And the electric range — the entire philosophical justification for the exercise — was 18 miles. Eighteen. You could deplete it commuting to a farmers market. The three-cylinder, for all the acoustic engineering BMW poured into it, was piped through the speakers, and enthusiasts have never once forgiven a car for that.

The World Measured the Wrong Thing

Here is where I part company with the consensus.

The charge sheet assumes a supercar is a machine for producing acceleration, and that everything else — the doors, the proportions, the theater — is packaging applied afterward to help sell the acceleration. Under that model, a car that looks quicker than it is must be committing a fraud.

I want to reject the word people reach for here, because it is lazy. The i8 is not fake. Nothing on it is a costume. The buttresses that make the rear look like it is levitating are hollow because air moves through them. The doors open upward because the carbon tub has a high, wide sill and there is no elegant way in otherwise. The stance is low because the battery is in the floor. Every dramatic gesture on that car is load-bearing.

A body kit is a costume. The i8 is tailoring. The distinction matters, and it is the difference between a car pretending to be something and a car that simply refused to make the quarter mile the point.

Because that was the actual thesis, and BMW stated it plainly at the time: this is what a sports car looks like when you stop optimizing for the drag strip and start optimizing for the next fifty years. The world heard that, checked the 0-60 time, and filed it under failure. But nobody has built a coherent second attempt at the idea since — and every manufacturer that mocked the i8 in 2014 is now selling a two-ton electric crossover with fake shift points. The i8 lost the argument and then won it, quietly, after the room had emptied.

What It Costs Now

This is the part where the case gets specific, and it starts with a rule you should not break.

Buy a refreshed car, and never an early one. For a Roadster shopper that decision is already made — the convertible only arrived with the 2018 mid-cycle refresh and died with the car in June 2020, which means every Roadster ever built is a refreshed car. American ones are titled as 2019s and 2020s; European examples can carry a 2018 model year. That refresh is the whole ballgame. It brought the larger 11.6 kWh battery, the bump to 369 horsepower, and the more capable electric motor. The 2014–2017 coupes ran a 7.1 kWh pack, and a meaningful number of those are already showing degradation you can feel. The Roadster never had a bad year. It is the rare case where the body style you want is also the only one that was ever built correctly.

The numbers underneath it are extraordinary. A 2020 i8 Roadster stickered at $164,295. Today the average listed i8 across Edmunds runs $61,335, and classic.com puts the model's overall average at $61,626. Roadsters ask a premium over coupes — call it $55,000 to $95,000 depending on miles and history — but the floor has real cracks in it. A 51,000-mile 2019 Roadster recently listed at $40,999.

Then there is the rarity, which almost nobody prices in. BMW built 20,465 i8s. Only 3,884 of them were Roadsters. For every Roadster, BMW built more than four coupes — 16,581 of them — and the 3,884 are spread across every market on earth. In practical terms it means you will not see another one, and neither will anybody at the restaurant.

The City Case

Everything written about this car in 2019 judged it as a sports car, which is why everything written about this car in 2019 got it wrong. Judge it as a city car and the picture inverts completely.

Eighteen miles of electric range is a punchline on a canyon road and a genuine feature in Los Angeles. It is enough to get to dinner and most of the way home in silence, with the roof down, at a speed the car will sustain electrically up to 75 mph. You arrive at the valet stand having made no noise at all, which is a flex of a much more interesting kind than the one the Lamborghini in the next spot is attempting. Then, when you actually need it, there is a combustion engine and 420 lb-ft, and 27 mpg combined once the battery is empty — which is to say it returns better fuel economy than a Camry did a decade ago while looking like the closing shot of a science fiction film.

And the cabin genuinely holds up. The i8's interior was designed by people who had been told the car was a statement about the future and who took the brief seriously — the layered dash, the floating instrument binnacle, the naturally tanned leather in the Tera World cars that BMW cured with olive leaf extract because of course it did. It has aged better than the interior of nearly every 2019 car costing twice as much, for the simple reason that it was never trying to look like 2019.

Yes, But the Taycan

Now the knife.

The strongest case against the i8 Roadster is not that it is slow. It is that the used market has quietly parked something objectively better in the space right next to it, and in some cases underneath it. A 2022 Porsche Taycan currently carries a resale value around $49,400, and 2020–2022 cars broadly sit in a $45,000 to $65,000 band. That is i8 money — occasionally less than i8 money.

What does that buy you? A newer car. A faster car. A car with four doors, four seats, and enough range to leave the county. A Sport Turismo if you want the wagon, which is one of the great shapes of the decade in its own right and vastly more useful than a two-seat convertible with a trunk you can measure in grocery bags. Porsche interiors are excellent. Porsche service networks are everywhere. On any spreadsheet a rational adult would build, the Taycan wins, and it does not win narrowly.

So here is the honest rebuttal, and it is not a spreadsheet rebuttal, because you cannot win this one on a spreadsheet.

Nobody photographs a Taycan in a parking garage. Nobody's kid points at one. A Taycan is a superb appliance that happens to be built by Porsche, and in ten years there will be a hundred thousand of them and they will look like what they are: a very good sedan from the early 2020s. There are 3,884 i8 Roadsters, they look like nothing else that has ever been sold, and they will look like nothing else in 2040 either. If what you want is transportation with a Porsche crest, buy the Taycan. If what you want is to own an object, the calculus is different, and the Taycan does not participate in it.

The Battery Question

This is the part where I stop making the case and start telling you what could go wrong, because a piece like this is worthless if it only argues one way.

The problem with the i8's high-voltage battery is not that it fails often. It is that nobody can tell you what it costs when it does, and the spread in the estimates should genuinely worry you. RepairPal puts a high-voltage pack replacement between $4,712 and $5,396. Owner accounts collected from forums point at $15,000 to $25,000, depending on whether BMW can source a pack at all and who ends up doing the work.

That is not a range. That is an absence of information wearing a range as a disguise. On a car whose entire identity is its powertrain, on a model that has been out of production since 2020, with a parts supply that gets thinner every year and a shrinking population of technicians who have ever opened one — that uncertainty is the risk. Not the failure rate. The unknowability.

Everything else about owning one is more reasonable than you would expect. Routine maintenance is less demanding than a comparable combustion sports car, because a 1.5-liter three-cylinder is a 1.5-liter three-cylinder no matter what it is bolted into. But run the annual number honestly, insurance included, and budget for the possibility that the answer to a warning light is five figures.

Three things to do before you sign anything. Get a battery health report, in writing, from a BMW dealer with i-certification — not a generic pre-purchase inspection. Confirm exactly where the car sits against its high-voltage battery warranty term, because on a 2019 or 2020 car you may still be inside it, and that coverage is worth more than any option on the window sticker. And run the VIN against BMW's recall record; there were six on this car, including a hybrid battery short-circuit campaign, and you want documentation that every one was completed.

So, Should You?

If you are shopping for performance per dollar, no. Absolutely not. There are a dozen quicker cars at half the price and you already know what they are.

If you are shopping for a car to keep, though — and if you have understood that you are buying an object rather than a lap time — then this is the best window there has ever been on the i8 Roadster and I do not think it stays open indefinitely. The depreciation is done. The car fell from $164,295 to around $61,000 and it has run out of room; the highest recorded i8 sale is $124,500 for a 2018 Roadster, which tells you the ceiling has not gone anywhere. The Taycan, meanwhile, is still falling. One of these cars has finished being a used car and started becoming something else. The other has not begun.