Macmilla:

You know that guy that races every car that passes him on the highway? That is me.
I once raced a v8 Prado jeep with my tiny i4 engine. The man new I was chasing him and he made me look like a fool severally. I later passed him technically. #in Lai Mohammed's voice.

Macmilla:

The more u guys argue, the more I see reasons to stay away from i4 and embrace v6. The bold line just describes me. I just had to back off a deal I had for a 2nd gen i4 solara. Going for v6 of same ride instead.

Siena:


True, to a certain extent. To be clear here, cruising is the art of accelerating up to a decent speed, then backing off slightly, allowing the engine to run on a part-open throttle. This is where any engine is most economical - providing the engine produces enough torque to maintain useful vehicle motion.

However, with an under-powered I4 engine, it is harder to maintain that sweet spot (approximately 2800-3200 rpm @ 70 mph). A naturally-aspirated I4 up to 2.0 litres with a modern 16V cylinder head is peaky, meaning it makes good power, but further up the rev range. This means the gearbox will be geared lower to make use of the high-revving characteristics inherent in naturally-aspirated multivalve engines.

Between 2800 and 3200 rpm, such an engine will not make bags of torque to sustain a constant road speed, without pushing the pedal harder every now and again. A turbocharged 4 will be happy here. So will a larger-capacity V6, boosted or naturally-aspirated. I have done long-distance trip, mostly driving on the Continent, with 4 passengers and luggage. I have found 4 cylinder engines to be thirstier on these trips. The smallest engined-car I drove from Central London through Calais, France ending up in Brittany, Northern France was a 2003 Renault Clio 1.4 16V manual. The car was 10 months old then, it averaged 44 mpg over 633 miles. My 2005 Audi A8 Quattro 4.2 V8 with a 6-speed Tiptronic transmission did the same trip, and averaged 32.7 mpg over 629 miles. It was much easier to maintain the sweet spot with the bigger car, and the engine was more relaxed.

Siena:
It's a common misconception that a V6 engine will use more fuel than an I4.

Fuel consumption is determined by:

Engine capacity.
Internal friction.
Emission level.
Vehicle weight.
Transmission type.

The most determining factor is the engine capacity. This is is the actual swept volume of the engine, the cylinder bores the pistons operate in. It stands to reason the larger the capacity, the more fuel is required to feed it. Sometimes though, the engine is designed to run lean (lean-burn technology) and so a 2.2L engine MAY use LESS fuel than a 1.8L version with standard fuel injection. Design is key.

Internal friction will also affect fuel mileage. This is where there is more resistance to rotation and piston movement. More resistance will require x amount more of fuel.

Emission levels are becoming increasingly stringent. We're currently on Euro 5, though 6 is just being introduced. The lower the emission level number, the more fuel the engine will use.

The myths that a V6 engine will use more fuel than an I4 are just that - myths. The main assumption here is that a V6 engine has a larger capacity than an I4. This is not always the case.

A Mazda 1.8 comes as a V6 in the '97 gMazda 323F. It WILL use LESS fuel than a 2.2 I4 in the '98 Toyota Camry. Euro 2 Vs Euro 2.
A Porsche 3.0 comes as an I4 in the '91 Porsche 944 S2. It WILL use MORE fuel than a 3.2 V6 FSI in a 2006 Audi A4. Euro 3 Vs Euro 5.
A Jeep 4.0 comes as an I6 in the '99 Wrangler. It WILL use MORE fuel than a 3.7 V8 40V in a 1999 Audi A8 Quattro. Euro 3 Vs Euro 3.

The above are just 3 out of millions of variables. I will cite another example to do with weight.

A '91 E34 BMW 518i (1.8L I4) WILL use MORE fuel than a '91 E34 BMW 520i (2.0 I6). Both Euro 3, but the smaller 1.8 4 cylinder in a relatively heavy car will be working harder, and require MORE fuel as a result. The bigger 2.0 6 cylinder will have an easier time, and require LESS fuel. This is one of the reasons BMW dropped the 1.8 engine for the 1992 model year in the E39. For those who allow their mechanics to yank out their engines in favour of a smaller version, take note!

Transmission type will also determine how much 2 similar engines will use fuel.

adanny01:


Thanks, it helps a lot.

I used my logical reasoning to assume somethings but later got it when pros came with details. If you read all comments you would have seen it.

Your comment has added to what have been said especially with regards to P, V, I and R with their relationships. The solution is bolded and the basis to the question i first asked.

Basically, the question was this way;
1. I have an inverter 1.2kva 12v 20A charger with one 12v 200ah battery
2. My friend has 2.4kva 24v 20A charger with two 12v 200ah battery in series.

I initially thought my friend's system would take twice as long as mine to fully charge (assuming resistance is the same and state of charge of batteries are all same).

After all that was said, my current understanding is that the two systems above will have approximately same charging time considering the assumptions made. Hope that is correct.

adanny01:


Initially, i thought otherwise that a 20amp charger for example will deliver the same power in any voltage system and would naturally take longer to charge when battery bank is increased. I have realised that thats not the only case since when voltage increases, power delivery increases proportionally. I arrived at a conclusion in this post below.



I got this reply from Chris which got me a little confused and sought to get some more explanations leading to the exchanges.



Thank you for your contribution. I now understand why Mercury 1.2kva 12v and 2.4kva 24v inverter have the same charging current of 20A but same charging time even with the 24v having twice the battery bank.

FxDuke:

dont try it if you are not disciplined and patient

saintjoel:


ASKING PRICE IS N1.550M + N400,000 CUSTOM DUTY.

saintjoel:


Asking price for the 04/05 Lexus rx400H is N1.960m + N400,000 custom duty.

Asking price for 02/03 rx300 is N1.4m + N250,000 custom duty.

**** SUBJECT TO FLUCTUATIONS IN EXCHANGE RATE****

**** EXCHANGE RATE AT N350 - N1,000 CEFA.

evergreen247:
Hello, pls i want the price of 04/05 lexus rx 400h and pls find out for me if 01/02 lexus rx or Toyota Harrier both with 4plugs 2.4 is available in Cotonou, if available, the price too. More grace to you.

saintjoel:


A dealer just got in touch when he heard from the grapevine that I was searching for the 2012 Mazda 6..

Asking price is N1750000 + N550,000 custom duty.

Asking price for 013 honda civic is N2.8m + N600,000 custom duty.

*****EXCHANGE AT N350 - 1,000 CEFA.

***** SUBJECT TO FLUCTUATIONS IN EXCHANGE RATE...

saintjoel:

NOT AVAILABLE FOR NOW.

evergreen247:
Pls what is the price of 2005/2006 Audi A3 5doors, 1.9TDI diesel and 1.6 petrol. I really want to know if i can find the 1.9 diesel, Manuals. I want to know exact or closest price pls.

kaeforum:


I don't know what you mean, could you clarify?

naijadeyhia:



Dude i own 3 rides that are point blank reliable anyday anytime and they are all 2005. A lincoln navi, a dodge caravan and a bmw x5, my wife drives the dodge. So you see, i am a sucker for reliability. 2 american brands and 1 german. Nothing beats a rugged vehicle. Have never driven a lemon all my life. Have gone from Benz to volvo to american and german but never japanese.

nobeku:
I don't think that's even de issue..you can find european cars in America and de owner might just wanna sell his/her car...what I am saying is for dis Kings dude to step right up to de hot seat and defend himself BEYOUND REASONABLE DOUBT!!!!