16v vs 8v Engines: Comparing Performance, Longevity, and Cost-Effectiveness in Gasoline Cars

Question

Hello.
I'm going to buy a gasoline car and everyone tells me an 8v engine is better than a 16v engine. What is the fundamental difference between these engines? which last longer and are cheaper to use ??

DUDAŚ · Answer

16v you have 4 valves per cylinder (4 * 4 = 16) and 8v you have 2 valves per cylinder (4 * 2 = 8)

Piotrek50501 · Answer

well, but do these 16v break down more often or what if people do not want to buy them ??

kamil907 · Answer

It depends on what engines you want, but usually 8-valve engines are more durable and less emergency.

robokop · Answer

16 valve engines are more strenuous and complex. More dynamics, unfortunately, comes with a lower durability and usually higher fuel consumption. If you are going to buy a gasoline car and set up LPG, look for the traditional 8 valve version.

DUDAŚ · Answer

16v are more expensive to renovate, they burn more, they do not like gas very much, sequences must be assumed. But they have more power. And 8v burn less, no major problems with gas, cheaper renovation (e.g. when the timing belt breaks) burn less.

PCcepuk · Answer

as in the topic of the number of valves in the engine, i.e. 16v, they will have 2x more than 8v

to sum up: the more valves, the more aired / ventilated engine,
that is, when driving dynamically, he will get more air-fuel mixture, which makes it more dynamic, more lively, stronger and flexible than, for example, 8v

and in repair it means the same thing

Anonymous · Answer

2 valves per cylinder has been an archaism for a decade ... Most Japanese gasoline engines in the early 1990s were only available with 4 valves per cylinder And in their motorcycles it has been standard since the 1980s? An incredible dilemma ...

Anonymous · Answer

Decent engines.

Anonymous · Answer

Usually the 16V has multi-point injection. 8V often have a single point injection which is much worse in fuel economy. Not to mention starting in winter, when in a single-point, fuel condenses on a long manifold until it heats up. A single point is such an electronic carburetor. Survival. If 1.6 8V has, for example, 60KM and 1.6 16V has, for example, 120KM, it is probably obvious that the latter will burn more if you drive both hard. The extra power is not for free and the fact that 16 valves will be much faster doesn't come from your butt. However, if you drive with the same power, 16V will burn much less. Liking or disliking gas has nothing to do with the number of valves. There are 2 valve engines that do not want to work and there are 4 valves which work great. Sequential injection is necessary when you have a plastic manifold and not 16 valves. So that a gas explosion (it happens in an installation with a mixer) does not destroy it. By the way, if anyone today thinks about installing a gas installation other than sequential, it is abnormal or has a 20-year-old corpse. Why weaken the engine and prepare for problems? why put on a mixer throttling the flow, some emulators that make it impossible to know what goes to the catalyst while driving on LPG? Why have a reaction delay because a meter long hose has to be filled with gas? Why be afraid of a possible gas explosion in the manifold and the collapse of the air filter and manifold housing? Someone lives here in the 90s or must save PLN 200 on the installation, to later lose much more on its servicing and troubles. The sequence is in a way a breakthrough in LPG and not something unwanted. I know because I had both. This is a huge difference and no more mixers and stepper motor hose. For example, how many times have your timing belt broken? However, if I had to advise something: - the condition of the engine is more important, such as whether it has 8 or 16 valves. - opinions about this engine, engines can be successful and unsuccessful, and it does not depend on the number of valves - engine parameters. Is not too weak for normal driving. If I were to look for differences between both technologies, it would be more in their characteristics: - as a rule, 8V motors have strong bottom and weak top. So they are strong in idle but weaken fairly quickly with increasing revs. This is due to poor ventilation of the 2 valve units. That is why 4-valve units were created. - while 16V they get additional power somewhere from 4000 rpm, so where 8V is already weakening. This is due to the additional valves that show their face then. Motors with variable valve phase additionally change the way they are opened, which additionally adds power at very high revolutions. But that's how I wrote 'mostly'. There are exceptions.

Piotrek50501 · Answer

I was thinking about the Opel Vectra B. What do you think about it ?? I would choose the engine 1.6 8v. Does anyone know if there is any other 8v petrol engine than 1.6 ??

kamil907 · Answer

Generally, everything from VB would be ok if it wasn't for the weak cymbals. When buying, pay special attention to their condition. In addition, it is a car that is quite cheap to maintain and is not particularly emergency.

Anonymous · Answer

As above - a good car but corrosion eats it.

This 1.6 8V is considered the least emergency Vectra engine. But I would not be afraid of the 1.6 16V engine in the Vectra. This is a very successful Opel engine, very popular, so the availability of parts is quite high. We had such a Vectra for many years, with LPG and no engine problems, and we made a lot of mileage. The only drawback is that, like all Ecotec 'made in Opel' engines, it uses oil, about 0.5l from change to change. They have been like that since the news.

The car was sold only due to the increasingly difficult to control corrosion. And reversing this car is a horror. Neither in the mirrors attached to the car nor through the rear window is very clear where the car ends.

Oh, in the suspension, the front stabilizer bar links wear out too often and knock. But such fasteners cost PLN 20 each and you can replace them yourself, it is trivial.

michael1986 · Answer

Here you have a nice description of what it is all about 16v engine . In my opinion, nowadays, with these fuel prices only 16v - you can safely assume gas for them, do not be afraid of that. 8v may make sense today, but only with turbo.

Added after 4 [minutes]:

Piotrek50501 wrote:
I was thinking about the Opel Vectra B. What do you think about it ?? I would choose the engine 1.6 8v. Does anyone know if there is any other 8v petrol engine than 1.6 ??

it seems to have 75 hp - a light massacre in this rather heavy car. it seems that around 16 seconds from 100 km / h, do as you like but today the new compacts have 12 seconds by 100 km / h maximum - most have less. In 3 years, with such a car, you will be typical traffic jams in the city or on the uphill route. From year to year, the performance of cars is moving forward. It is different, some 2.0 8v - that would be enough but there is no such thing in Vectra B if I am not mistaken.

xyro · Answer

For such a vectra it is a minimum of 1.6 16v and optimally 1.8 16v or 2.0 16v.
When it comes to durability, the 1.6 8v, despite its poor performance, is more durable and tolerates gas better. It is enough for a smooth ride. An alternative to the vectra is the astra f 1.6 8v which is less emergency, just as rotting and the estate version not so stupid. Unfortunately, these cars have their own years and everything can fit together.

michael1986 · Answer

I doubt that a 1.6 8v that will still need high speed will be more durable than a 2.0 16v. A low-power engine for more than 1,200 kg will not be durable. The cost of repairing the 8v head and the cost of repairing the 16v are not that big of a gap. It would be worse in the case of v6.
As for gas, a properly installed installation will be easier in a more powerful engine than in a weak engine that will still have a high load and speed.

Boohay22 · Answer

If it is to be a Vectra B, the best engine for the version before the lift will be: sedan 1.8 X18xe - 115 km or station wagon 2.0 X20xev - 136 km, both engines tolerate gas installations - sequential (almost identical combustion of petrol and gas). However, the 1.6 is too weak for the weight of the car 1,200 - 1,417 kg (station wagon). Fuel consumption is similar in both engines, depending on how often you step on the left pedal. As already noted, Ecoteki like oil, no matter if 1.6, 2.0, 2.5V6. In the case of compression-ignition engines, slow but economical and durable, the 1.7 TD (isuzu), or similarly economical, but the Opel 2.0 DTH design. Characteristic faults plague each of the engines that you can look for and read on the Internet.

xyro · Answer

The 1.6 is not crazy in such a vectra, but it is the second least fail-safe engine after the 2.0 8v. 1.6 16v is ok, much better pulls. If the pleasure of driving is only the eco kibel 2.0, but the costs can sometimes catch up. As durability and low maintenance cost is only 1.6 8v.

czmiel_t · Answer

Taking into account the lack of variable valve timing in these cars, 8v will pull better from the bottom, but at 4k / rev it will get short of breath, 16v will be weaker at the bottom but from 3k / rev it only starts to pull and pulls hard almost to cut-off. Generally 8v for Sunday rides to church and for everyday use when you need some dynamics of 16v. There should be almost no difference in combustion. Toyota heads, which have been using FE 16v engines since the 1980s, are designed to burn a lean fuel mixture and, despite driving at higher revs, burn very little. I know it from the autopsy because I have been driving Japanese for several years and I have a comparison to other 8V engines. Fuel consumption is even lower and performance is much better.

16v vs 8v Engines: Comparing Performance, Longevity, and Cost-Effectiveness in Gasoline Cars

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