For interior space, SoCalMike's '88 Accord has a good case to be
today's Civic.
The '94 is a bit larger, though all of them share many dimensions
within 1" of each other
data from here:

http://autos.msn.com/research/compar...=t1418&v=t6971


Exterior Dimensions & Weight
2006
1994 1988
Civic LX Sedan Accord LX sedan Accord LX Sedan
Curb Weight - Automatic (lb.) No data No data 2943
Curb Weight - Manual (lb.) 2685 2579 2877
Wheelbase (in.) 106.30 102.40 106.90
Length (in.) 176.70 179.70 184.00
Width (in.) 69.00 67.40 70.10
Height (in.) 56.50 53.40 55.10
Track Front (in.) 59.00 58.30 59.60
Track Rear (in.) 60.20 58.10 59.10
Ground Clearance (in.) No data No data No data
Interior Dimensions
Civic LX Sedan Accord LX sedan Accord LX Sedan
Standard Seating 5 5 5
Optional Seating No data No data No data
Front Headroom (in.) 39.40 38.70 39.40
Rear Headroom (in.) 37.40 37.10 37.60
Front Legroom (in.) 42.20 42.80 42.70
Rear Legroom (in.) 34.60 32.40 34.30
Front Shoulder Room (in.) 53.70 54.90 55.70
Rear Shoulder Room (in.) 52.40 54.50 54.30
Front Hip Room (in.) 51.90 52.80 52.60
Rear Hip Room (in.) 51.00 50.00 51.40