Power to Weight
03-19-2003, 03:51 PM
#1
Registered User
Thread Starter
Join Date: Jan 2003
Location: www.rx8ownersclub.co.uk
Posts: 1,040
Likes: 0
Received 0 Likes
on
0 Posts
Power to Weight
Im not a technical guru when it comes to cars, but I understand that where performance is concerned weight=bad and bhp=good!
Therefore a cars power to weight ratio seems more sensible than just looking at bhp.
I know there are a number of other issues here such as dare I say it - torque, and gearing etc, but I always thought that bhp/tonne was a simplistic way of comparing performance.
The RX8 accoding to 'Evo' is 1300kg and 237 bhp. That is 182bhp/tonne by my reconing.
That seems to be a seriously good figure as my 1470kg 261bhp Impreza is only 177bhp/tonne.
Other cars in the region of 180bhp/tonne are (in the gospel according to Evo):
Focus RS 169
Civic TypeR 166
TT 225 164
Alfa 156GTA 180
Audi S4 178
BMW 330i 153
S2000 191
Boxster 182
This implies that the RX8 is more than a match (in straight line performance anyway) for most of the cars listed above all things being equal. Am I mssing something or is this the case?
Therefore a cars power to weight ratio seems more sensible than just looking at bhp.
I know there are a number of other issues here such as dare I say it - torque, and gearing etc, but I always thought that bhp/tonne was a simplistic way of comparing performance.
The RX8 accoding to 'Evo' is 1300kg and 237 bhp. That is 182bhp/tonne by my reconing.
That seems to be a seriously good figure as my 1470kg 261bhp Impreza is only 177bhp/tonne.
Other cars in the region of 180bhp/tonne are (in the gospel according to Evo):
Focus RS 169
Civic TypeR 166
TT 225 164
Alfa 156GTA 180
Audi S4 178
BMW 330i 153
S2000 191
Boxster 182
This implies that the RX8 is more than a match (in straight line performance anyway) for most of the cars listed above all things being equal. Am I mssing something or is this the case?
03-19-2003, 04:05 PM
#3
Administrator
This implies that the RX8 is more than a match (in straight line performance anyway) for most of the cars listed above all things being equal. Am I mssing something or is this the case?
03-19-2003, 04:50 PM
#4
ex-preorderer
Join Date: Mar 2003
Location: Dundee, Scotland
Posts: 171
Likes: 0
Received 0 Likes
on
0 Posts
Re: Power to Weight
Originally posted by MarkW
The RX8 accoding to 'Evo' is 1300kg and 237 bhp. That is 182bhp/tonne by my reconing.
That seems to be a seriously good figure as my 1470kg 261bhp Impreza is only 177bhp/tonne.
...
This implies that the RX8 is more than a match (in straight line performance anyway) for most of the cars listed above all things being equal. Am I mssing something or is this the case?
The RX8 accoding to 'Evo' is 1300kg and 237 bhp. That is 182bhp/tonne by my reconing.
That seems to be a seriously good figure as my 1470kg 261bhp Impreza is only 177bhp/tonne.
...
This implies that the RX8 is more than a match (in straight line performance anyway) for most of the cars listed above all things being equal. Am I mssing something or is this the case?
Assuming you gear the two cars so that they're both at their power peak at the same speed, then yes, the RX-8 will pull harder *at that speed*. You'd need to look at power curves to work out how they compare at other speeds.
Last edited by lurcher; 03-19-2003 at 05:03 PM.
03-20-2003, 04:21 AM
#5
Registered User
Join Date: Jan 2003
Location: Kent, England
Posts: 890
Likes: 0
Received 0 Likes
on
0 Posts
I think its become an accepted notion that the RX8 needs to be driven with revs fairly high to get best performance. However considering how easily this engine should rev compared to a 4 pot this should not be a major problem.
rael.
rael.
Thread
Thread Starter
Forum
Replies
Last Post
jasonrxeight
RX-8's For Sale/Wanted
2
09-30-2015 01:53 PM
Learners_Permit
Series I Interior, Audio, and Electronics
8
09-27-2015 07:38 PM
Evan Gray
Series I Trouble Shooting
0
09-26-2015 12:30 PM