As some of you may know from this question i am currently rebuilding my car. The plan is to rebuild it from scratch. An important part is the engine. At the moment there is a 1.4l 8V petrol engine with 60HP(44KW?). This is, of course, a bit too little for the effort this project is going to have (IMHO). So i plan on getting a bigger engine.
The biggest engine in this model is a 2.0l 16V petrol engine with ~150HP. But i think this will also be too little. Unfortunately i have no specific plan on which engine(power) to use. I could think of about 400-500HP at the end. The normal weight of the car (from the papers) is about 980kg.
There wasn't an official 4x4 version of this model, only a few (1-5 maximum) self-made versions. So i can't simply get the base of a 4x4 one. But from this i know it is possible to build it.
The problem is that i have little to no experience with AWD or 4x4, but i would like to learn more about this in general. I already learned a bit about the differences between 4x4 and AWD from this question. I am primarily interested in the use of 4x4 or AWD on the street.
The main reason for this is, if there will be traction problems because of the power/weight ratio. There is no use for a 500HP engine if the car can't go forward anymore.
So when will the car benefit from a 4x4/AWD modification? What aspects do i have to take in consideration (for example HP, Weight, nm, cost...)?
What is the 'best' behaviour for street use? full/part 4x4 or AWD or...? The car won't be used off-road.
Addition to make the Q less broad
What specific parts do i need to change in order to build AWD in a car whose series never had a performance version with built-in AWD? Apart from the AWD system and the modifications on the bottom of the car to install the AWD system properly.
I am aware of the fact that for this increase in power, there are many more things to do (improving the brakes, chassis,
landing gear and some things more) but that is not the question here.
I know the cost is an essential part of this project, but the cost is not the problem here.
If there is need for more informations please tell me. I will then add this as soon and good as i can.
As i expected the question. The car i'm talking about is an Opel Astra F CC from 1995.
By landing gear i mean the summary of parts for the connection between the vehicle and the undergrounde. I don't know the exact english term. The german term is "Fahrwerk". Here a wiki link. I hope thats helps.