MG HS PHEV mpg/range with battery depleted / Engine only

[jwpalfrey]

Hi All,

I'm seriously considering a MG HS PHEV but the engine efficiency concerns me and PHEV WLTP/EPA are all so skewed as the undertake the test with a fully charged battery, longer on EV mode the higher the mpg (less fuel burnt) so it's worse than the dieselgate days. Anyway can anyone who's got/had one give me an idea of the real consumption when the battery is depleted? Mixed usage would be good.

I'm contemplating asking to test one for 24hrs as I'm certain the EV range will be fine for most trips but I want to work out rough costs when running on petrol engine alone as this is massively variable and widely published.

I've had petrol/diesel for years and know how to get the best or worst out of them. But coming from a diesel at 60mpg a PHEV has to do a lot of EV miles to counter poor mpg when on petrol alone and need to roughly work out consumption on engine alone in order to do the maths.

Anyway any info much appreciated, as I say I may try and borrow a MGHS phev from a dealer and run it without charging it as that'll be a really simple indicator for what I want to find out.

 

[JohnMG]

Over the year I've had mine, I've made many long (450 mile) trips from SE England to Scotland, mostly with battery on minimum charge, certainly on the return trip. I don't spare the horses on the motorways, and tend to cruise at around 77 mph. In short, expect to average 40 mpg. Also be aware that the petrol tank capacity is only about 32 litres (7 imp. gallons), so at least one stop for petrol. Still, a lovely comfortable car for such journeys, so give it a try.

 

[FAA Jock]

I can confirm that after a 600 km journey (mostly motorways , with maybe 20% A roads) I returned about 42 MPG. For the last 12 months I have averaged 82 MPG. Pretty good for a heavy, not so good aerodynamically shaped SUV. Lovely comfortable car for long journeys.

 

[Kerno]

As John said around 40 if you drive around the speed limit if you up the pace a bit 80mph plus it takes a bit of a dive to around 36mph. As John also said it's a comfortable car on the motorway and in my mind with the poor mpg.

 

[Deleted member 14627]

Hi All,

I'm seriously considering a MG HS PHEV but the engine efficiency concerns me and PHEV WLTP/EPA are all so skewed as the undertake the test with a fully charged battery, longer on EV mode the higher the mpg (less fuel burnt) so it's worse than the dieselgate days. Anyway can anyone who's got/had one give me an idea of the real consumption when the battery is depleted? Mixed usage would be good.

I'm contemplating asking to test one for 24hrs as I'm certain the EV range will be fine for most trips but I want to work out rough costs when running on petrol engine alone as this is massively variable and widely published.

I've had petrol/diesel for years and know how to get the best or worst out of them. But coming from a diesel at 60mpg a PHEV has to do a lot of EV miles to counter poor mpg when on petrol alone and need to roughly work out consumption on engine alone in order to do the maths.

Anyway any info much appreciated, as I say I may try and borrow a MGHS phev from a dealer and run it without charging it as that'll be a really simple indicator for what I want to find out.

I have one that is 5 months old done 3,300 miles and is in showroom condition I paid £33,500 cash for it, all the Tweaks done such as uv tinted front glass mud flaps and side steps, body & wheel protection done too £29,000 if your interested?

 

[sky0000547]

Agree 40MPG on a run without driving gently. The car never totally run out of charge, there will always be some in reserve. Even though the EV mileage might say 0 mile/0% and it won’t allow you into full EV but in Auto it will still switch to EV automatically when below 25mph so there is still some electric power in reserve.

 

[midician]

The car is often marketed as 1.7l/100kms - which is true for the first 100km because you are running on battery for the first 63km .

After that I get around 7l/100km on petrol alone . Which isn’t bad at all , considering that’s what my Golf Mk6 did !

 

[JohnMG]

As update to my previous comments on this, I just completed a 450 mile drive in UK, mostly A1M and M74 motorway with A66 dual/single carriageway, a few traffic jams, 2 passengers with luggage, zero battery for nearly all of the way. Result: 36 mpg (7.8 L/100km). Overall consumption average over 12,000 miles including several long trips = 40.1 mpg. Not great, but I can live with it.

 

[al fred]

Hi All,

I'm seriously considering a MG HS PHEV but the engine efficiency concerns me and PHEV WLTP/EPA are all so skewed as the undertake the test with a fully charged battery, longer on EV mode the higher the mpg (less fuel burnt) so it's worse than the dieselgate days. Anyway can anyone who's got/had one give me an idea of the real consumption when the battery is depleted? Mixed usage would be good.

I'm contemplating asking to test one for 24hrs as I'm certain the EV range will be fine for most trips but I want to work out rough costs when running on petrol engine alone as this is massively variable and widely published.

I've had petrol/diesel for years and know how to get the best or worst out of them. But coming from a diesel at 60mpg a PHEV has to do a lot of EV miles to counter poor mpg when on petrol alone and need to roughly work out consumption on engine alone in order to do the maths.

Anyway any info much appreciated, as I say I may try and borrow a MGHS phev from a dealer and run it without charging it as that'll be a really simple indicator for what I want to find out.

Hi. I was wondering the same thing. We tow a light ish caravan and the Phev looked good but looking at the power spec on a flat battery it’s worrying. It’s only 142 bhp and 75 lb ft torque less plus it weighs 300’kg more!!! So reluctantly changed to the petrol which has 167 bhp all the time. There’s a new hybrid coming out but garage seems to think it will be the lower power engine. Not sure though. Good luck with it. I’ve sent far too long trying to find this out!!

As update to my previous comments on this, I just completed a 450 mile drive in UK, mostly A1M and M74 motorway with A66 dual/single carriageway, a few traffic jams, 2 passengers with luggage, zero battery for nearly all of the way. Result: 36 mpg (7.8 L/100km). Overall consumption average over 12,000 miles including several long trips = 40.1 mpg. Not great, but I can live with it.

Think this earlier model might be better as it’s not hauling round such a massive battery when flat and it’s a lighter car I think.

 

[MGDriver]

Over the year I've had mine, I've made many long (450 mile) trips from SE England to Scotland, mostly with battery on minimum charge, certainly on the return trip. I don't spare the horses on the motorways, and tend to cruise at around 77 mph. In short, expect to average 40 mpg. Also be aware that the petrol tank capacity is only about 32 litres (7 imp. gallons), so at least one stop for petrol. Still, a lovely comfortable car for such journeys, so give it a try.

The all new MG HS PHEV has a full 55 litre fuel tank along with a 75 mile EV range, the set up on the new HS PHEV is different, in the case that even at higher speeds the wheels are being driven by the electric motor, with the engine providing charge and driving support, it only has a 2 speed gearbox also, unlike the old HS PHEV with a 10 speed DCT gearbox

Bear in mind, most people will be talking about the old model HS PHEV, rather than the All New HS PHEV that launched mid 2024

 

[al fred]

The all new MG HS PHEV has a full 55 litre fuel tank along with a 75 mile EV range, the set up on the new HS PHEV is different, in the case that even at higher speeds the wheels are being driven by the electric motor, with the engine providing charge and driving support, it only has a 2 speed gearbox also, unlike the old HS PHEV with a 10 speed DCT gearbox

Bear in mind, most people will be talking about the old model HS PHEV, rather than the All New HS PHEV that launched mid 2024

Thank you. You are the first person to have actually told me this. Even the mg garage didn’t know that the engine is mostly a charger! Very
grateful.

 

[al fred]

Thank you. You are the first person to have actually told me this. Even the mg garage didn’t know that the engine is mostly a charger! Very
grateful.

Does that mean that the higher torque is nearly always available?

 

[aerofurb]

For more info on the ‘2025’ MG HS PHEV, Google for the Roewe D5X DMH. This is the sister car to the MG HS PHEV and appeared earlier in 2024.

There’s a lot of tech in their with the dual motors and whilst it could be considered predominantly a ‘range extender ICE’ that’s only part of the story.

It can operate as a series or parallel hybrid system.

On a full charge, the EV range appears as 75 miles range.

At 6 miles EV range (or thereabouts), the ICE will kick in. This appears to ensure you always have EV power available and the battery never fully depletes (unlike my previous Skoda Superb iV PHEV).

As has been said, it’s a two speed gearbox so the EV is always used for the initial get up and go, even when the ICE is running.

For sure the very cold weather reduced the actual EV range (lights and air on/heating on) but that’s to expected.

On an 80 miles trip yesterday evening with a mix of hybrid drive on single and dual carriageways and 10 miles of EV only in town, it showed 58 mpg which isn’t too shabby. Again lights and aircon/heater on. That was after a 50 mile motorway HEV drive in the morning. I still have 40 miles of EV range showing for the trip home. Obviously, the ICE MPG drops a bit whilst it’s charging the EV battery.

Electric aircon/heater is brilliant. Hot air in under two minutes.

3500 miles in on mine (after 55000 in the Superb iV) and loving every drive!

 

[al fred]

Thanks for taking the time to write this. It’s really interesting and makes me think that caravan towing us not out of the question- once I can get a tow bar !! I hadn’t realised that the ice is also used as a range extender. That makes all the difference. Interestingly I think the model you suggested looking at seems to have faster charging I think. Cheers!

 

[aerofurb]

There are a few differences between the MG HS and Roewe D5X DMH - apart from the bumpers, door handles and dash. We get a bigger EV battery on the MG.

Most PHEVs only charge at 3.6kW so the 7.2kW on the new HS is good. In reality, you aren’t going to be charging away from a home charger as it’ll be little offence in cost per mile over petrol. Big benefit is home charger cheap electric, then leave the software to do its own thing charging the EV battery as it sees fit.

As it has more than 69 mile EV range the company car BIK is 5% which is only 1% more than a pure BEV.

If there’s a towbar (preferably removable ball) available, I’d definitely have one. Not for a caravan but a small trailer or bike rack.

 

[New to MG]

The all new MG HS PHEV has a full 55 litre fuel tank along with a 75 mile EV range, the set up on the new HS PHEV is different, in the case that even at higher speeds the wheels are being driven by the electric motor, with the engine providing charge and driving support, it only has a 2 speed gearbox also, unlike the old HS PHEV with a 10 speed DCT gearbox

Bear in mind, most people will be talking about the old model HS PHEV, rather than the All New HS PHEV that launched mid 2024

Thank you for this most interesting note. We have not got the new MG HS PHEV in Australia (or as we call it here the MG HS + EV). This new model is expected to become available in Australia in June 2025. I presently drive the MY 2023 (the old one with the 16.6 kWh battery).

I am interested in your comment " ...even at higher speeds the wheels are being driven by the electric motor, with the engine providing charge and driving support ...".

So does that mean the new model does not have an EV ONLY driving option like the older car I drive? The EV only option for distances below 60 km uses zero petrol.

I believe the new car / model will have a 115km (70 miles) EV only range?

 

[MGDriver]

Thank you for this most interesting note. We have not got the new MG HS PHEV in Australia (or as we call it here the MG HS + EV). This new model is expected to become available in Australia in June 2025. I presently drive the MY 2023 (the old one with the 16.6 kWh battery).

I am interested in your comment " ...even at higher speeds the wheels are being driven by the electric motor, with the engine providing charge and driving support ...".

So does that mean the new model does not have an EV ONLY driving option like the older car I drive? The EV only option for distances below 60 km uses zero petrol.

I believe the new car / model will have a 115km (70 miles) EV only range?

The all new HS PHEV does have an EV ONLY mode, the point i was making was that the electric motor drives the wheels the whole time, with the engine assisting at higher speeds, rather than taking over

 

[New to MG]

The all new HS PHEV does have an EV ONLY mode, the point i was making was that the electric motor drives the wheels the whole time, with the engine assisting at higher speeds, rather than taking over

Thank you.
So is that the same as, or different to, the earlier 2022-23 car? Sorry for my ignorance.
I am asking in order to learn - in case I think of changing / upgrading next year to the all new HS PHEV.

 

[MGDriver]

In the old HS PHEV, the car had a 10 speed gearbox, meaning that the engine would drive the wheels as a normal car when the battery was depleted,

Whereas in the new HS PHEV, it has a 2 speed gearbox so the engine will only drive the wheels directly under extreme acceleration,

 

[PhilK]

Thank you for this most interesting note. We have not got the new MG HS PHEV in Australia (or as we call it here the MG HS + EV). This new model is expected to become available in Australia in June 2025. I presently drive the MY 2023 (the old one with the 16.6 kWh battery).

Just checked the Australian MG site, and there is no hybrid model for the HS anymore. It's not even "coming soon".