Twin-test time, with the Toyota Corolla hybrid in sedan and hatchback formats.

Prices: GX hatch (as tested) $33,490, SX sedan $35,490. An SX version of the hatch has also just been introduced, at $35,490.
Powertrains and performance: 1.8-litre four cylinder petrol engine, 72kW at 5200rpm, 142Nm at 3600. Combined with Toyota hybrid system for total system output of 90kW. Front-wheel drive. Hatch 4.2 L/100km, 97 g/km CO2, sedan 3.5 L/100km, 81 g/km CO2.
Vital statistics: Hatch: length 4370mm, width 1790mm, height 1435mm, wheelbase 2640mm. Sedan: length 4630mm, width 1780mm, height 1435mm, wheelbase 2670mm. Luggage: hatch 208 litres, sedan 470 litres.
We like: Hatch: better looks, better drive. Sedan: more interior room, superior fuel economy.
We don’t like: Hatch: That lack of interior room. Sedan: Those conservative looks.

THIS is a tale of two Toyota Corolla hybrids – one a hatch, the other a sedan. We’re comparing one model against the other because it could be said that while one body style puts form before function, the other puts function before form.

The comparison had its beginnings back in 2018 when Toyota New Zealand launched the new 12th generation Corolla hatch, which went on sale in petrol and hybrid forms.

This powertrain choice was important, because it represented the latest step in Toyota Motor Corporation’s grand plan to offer a hybrid version of every popular model by 2025. And especially important for TNZ, because it was known that the Government intended introducing a proposed Clean Car Initiative from 2022.

Remember that? The initiative, introduced in July last year, proposes a Clean Car Standard (a fuel efficiency standard) and a Clean Car Discount (a feebate scheme that would apply a rebate or penalty depending on exhaust emissions), all with a target for 2025 of exhaust emissions of no more than 105 grams per kilometre (g/km) of CO2.

Not much has been heard of a proposal since. Submissions closed in August last year and presumably are now being considered. Then in February New Zealand First took action to put the kybosh on the whole plan anyway, but the Greens countered by saying they would make it an Election issue.

MMP politics, huh? But what is a constant through all this proposal, submission and debate is the acknowledgement that something has to be done about the role transport plays in the level of New Zealand’s greenhouse gas emissions. After all, light vehicles – which are all vehicles of 3.5 tonnes gross vehicle weight or less – account for almost two-thirds of our country’s transport emissions, which in turn account for 20 per cent of all emissions.

So with that background, it was good that Toyota NZ launched the 12th generation Corolla hatch with a choice of variants with petrol-electric hybrid powertrains. In hatch form the Corolla hybrid has an official average fuel consumption of just 4.2 L/100km and exhaust emissions of 97 g/km of CO2.

That’s way below the Clean Car Initiative’s 105 g/km target for 2025. Corolla has also helped Toyota NZ reduce the average CO2 emissions by close to 10 per cent across its entire vehicle fleet, because the hatch immediately became among New Zealand’s most popular passenger vehicles, with a high percentage of sales (current 68 per cent) the hybrids.

But as popular as the new Corolla hatch has been, it also has some glaring faults. It has a lovely exterior design, particularly the rear where the hatch gracefully sweeps down from the roofline. But these swept lines also translate to the car’s biggest design issue – a lack of rear space.

The rear seats are cramped for legroom, and with all seats in use there is a mere 208 litres of cargo space under the tonneau cover (300 litres in the top ZR model which carries a tyre repair kit rather than a spare).

In every other respect the new Corolla hybrid is a really good car that offers an excellent drive and which carries leading-edge technology. But the vehicle’s interior function has been compromised by its exterior form, and the end result is a Corolla hatch that is not quite as good as it should be.

So what to do about it? Toyota has come up with an obvious solution – it has released a sedan version of the Corolla that offers a lot more interior room. Even better, it includes a hybrid variant that is cleaner than even the hatch, with claimed average fuel consumption down to 3.5 L/100km and exhaust emissions a low 81 g/km of CO2.

By the way, as I wrote this article, the news broke about the UK couple who had been allowed to breach the Covid-19 lockdown requirements and had apparently driven non-stop from Auckland to Wellington to attend a funeral. This prompted the mainstream media to speculate whether it was possible to drive this 640 km distance on one tank of fuel.

Well, the Corolla sedan hybrid is so economical that despite the fact its fuel tank carries just 43 litres of petrol rather than the usual 50 litres, theoretically it could not only be driven from Auckland to Wellington on one fill – but also back to Taupo. That’s impressive. And I’ve got to admit it’s a comforting feeling when you fill up the vehicle and the onboard computer tells you your distance to empty is 1032km.

The sedan is able to achieve better fuel consumption than the hatch not only because its body design is more slippery, but also because whereas the hybrid hatch at GX and SX level has 16-inch wheels shod with conventional Dunlop 205/55 R16 tyres, the sedan (which is only available as an SX) has 15-inch wheels shod with low rolling resistance Bridgestone 195/65 R15 tyres. Overseas experts say such tyres can achieve fuel savings of as much as 15 per cent.

Mind you, I have to say that during a long trip in this sedan, I was unable to achieve an average fuel consumption that was any better than 4.0 L/100km, which is what my wife and I regularly achieve with the Corolla hybrid hatch that we own. And I tried hard, too – I was really looking forward to seeing if I could get the consumption down to at least the claimed 3.6 L/100km open road figure.

I suspect it was all because low rolling resistance tyres or not, it is impossible to achieve any vehicle’s official consumption figures when driving on coarse chip sealed roads that wind through New Zealand’s rolling landscape.

The sedan is also 260mm longer than the hatch but slightly narrower, and its wheelbase has been extended by 30mm to 2670mm. All this has allowed the load space in the boot to be 470 litres, more than double that of the hatch.

A personal test of any vehicle’s load space is to load my golf clubs into it – you’d be surprised how many vehicles, even some substantial European SUVs, can’t accommodate a bag and clubs side-on. With the Corolla hatch this task is impossible without first taking the woods out, but with the sedan there’s heaps of room.

Let’s go to the back seats. There’s more room in the sedan back there, too. In the hatch, the gap between the rear of the centre console to the front of the rear seat squab is 230mm, while in the sedan it is 300mm.

Both the hatch and the sedan are powered by the same Toyota hybrid system that combines a 1.8-litre petrol engine with an electric motor to provide a total system output of 90kW, and which is mated to what has to rate as one of the best CVT transmissions on the market.

Overall, it all presents an interesting choice. From the visual perspective, personally I feel the hatch is the more appealing of the two body styles – it has more character to it, while the sedan body shape is smooth to the point of being just a little boring. The hatch is also the more entertaining drive, because it is lighter and has the bigger wheels and tyres.

But what the hatch lacks, the sedan certainly doesn’t. The hatch doesn’t have sufficient rear legroom or rear cargo space, but the sedan does. The sedan also has the superior fuel consumption, which is saying something because the hatch is quite capable of returning figures of less than 4 L/100km when driven quietly.

So there we go. In many respects the Corolla hatch leans towards form over function, while the sedan favours function over form. And they’re both hybrids. It’s an excellent choice presented by one (or should that be two?) of the best small cars on the market.