1
                                                                    EXHIBIT 12.1

                     TRANSAMERICAN REFINING CORPORATION
                     RATIO OF EARNINGS TO FIXED CHARGES
                          (In thousands of dollars)

                                                                     
                                                              
                                                                                                              SIX MONTHS ENDED
                                                                   YEAR ENDED JULY 31,                           JANUARY 31,
                                                --------------------------------------------------------    --------------------
                                                  1991        1992        1993        1994        1995        1995         1996     
                                                --------    --------    --------    --------    --------    --------    --------
                                                                                                   
Loss before taxes                               $(11,967)   $(14,905)   $(19,373)   $(17,353)   $(64,337)   $(23,150)   $(26,071)
Add:
  Equity in loss of TransTexas                       --          --          --          --       13,925         --          156
  Interest expense, net of amounts 
    capitalized                                       26          21          17          14      12,504          31       5,978
  Portion of rental expense 
    representative of an interest factor             223         188         186         357         790         360         378
                                                --------    --------    --------    --------    --------    --------
      Earnings (B)                              $(11,718)   $(14,696)   $(19,170)   $(16,982)   $(37,118)   $(22,759)   $(19,559)
                                                ========    ========    ========    ========    ========    ========    ========
Fixed charges:
  Total interest                                      26          21          17          14      31,354       3,540      32,180
  Portion of rental expense 
    representative of an interest factor             223         188         186         357         790         360         378
                                                --------    --------    --------    --------    --------    --------    --------
      Fixed charges (A)                         $    249    $    209    $    203    $    371    $ 32,144    $  3,900    $ 32,558
                                                ========    ========    ========    ========    ========    ========    ========

Ratio of earnings to fixed charges 
  (B divided by A)                                   --         --          --          --          --          --          --
                                                ========   ========    ========    ========    ========    ========     ========
Earnings inadequate to cover fixed 
  charges                                       $ 11,967   $ 14,905    $ 19,373    $ 17,353    $ 69,262    $ 26,659     $ 52,117
                                                ========   ========    ========    ========    ========    ========     ========








                                                            Three Months Ended
                                                                April 30,      
                                                           -------------------  
                                                             1995        1996
                                                           --------    --------
                                                                  
Income (loss) before taxes                                 $(10,351)   $ 46,596
Add:
  Equity in (income) loss of TransTexas                         842      (1,001)
  Interest expense, net of amounts capitalized                4,633       1,088
  Portion of rental expense representative
    of an interest factor                                       315         242
                                                           --------    --------
      Earnings (B)                                         $ (4,561)   $ 46,925
                                                           ========    ========

Fixed charges:
  Total interest                                             11,221      17,705
  Portion of rental expense representative
    of an interest factor                                       315         242
                                                           --------    --------
      Fixed charges (A)                                    $ 11,536    $ 17,947
                                                           ========    ========

Ratio of earnings to fixed charges (B divided by A)             --          2.6
                                                           ========    ========

Earnings inadequate to cover fixed charges                 $ 16,097    $    --
                                                           ========    ========


   2
                                                            Exhibit 12.1 (Con't)


               TRANSAMERICAN ENERGY CORPORATION (AND PREDECESSOR)
                      RATIO OF EARNINGS TO FIXED CHARGES
                          (In thousands of dollars)



                                                                                                                 Six Months
                                                                                                                    Ended
                                                                         YEAR ENDED JULY 31,                     January 31,       
                                                     -----------------------------------------------------   --------------------   
                                                       1991        1992        1993      1994       1995       1995        1996   
                                                     --------    --------     -------   -------   --------   --------    --------
                                                                                                     
Income (loss) before taxes                           $43,950     $ 41,778     $90,990   $11,783   $(64,762)   $(23,525)   $(27,193)
 Add:                                                                                                    
  Interest expense, net of amounts capitalized         2,015        3,173       2,999    51,684     81,012      30,002      49,348
  Portion of rental expense representative                                                                   
   of an interest factor                                 356          403         460       736      1,321         643         715
                                                     -------     --------     -------   -------   --------    --------    --------
     Earnings(B)                                     $46,321     $ 45,354     $94,449   $64,203   $ 17,571    $  7,120    $ 22,870
                                                     =======     ========     =======   =======   ========    ========    ========
Fixed charges:                                                                                           
  Total interest                                       2,015        3,173       2,999    52,394    100,745      33,511      82,931
  Portion of rental expense representative                                                               
    of an interest factor                                356          403         460       736      1,321         643         715  
                                                     -------     --------     -------   -------   --------    --------    --------
     Fixed charges (A)                                 2,371     $  3,576     $ 3,459   $53,130   $102,066     34,154    $  83,646
                                                     =======     ========     =======   =======   ========    ========   =========
Ratio of earnings to fixed charges (B divided by A)     19.5         12.7        27.3       1.2        --          --          -- 
                                                     =======     ========     =======   =======   ========    ========   =========
Earnings inadequate to cover fixed charges           $   --      $    --      $   --    $   --    $ 84,495    $ 27,034   $  60,776  
                                                     =======     ========     =======   =======   ========    ========   =========
 


                                                      Three Months Ended
                                                           April 30,
                                                     --------------------
                                                       1995        1996    
                                                     --------     -------  
                                                                 
Income (loss) before taxes                           $(11,434)    $50,142  
 Add:                                                                      
  Interest expense, net of amounts capitalized         19,957      23,374
  Portion of rental expense representative                                 
   of an interest factor                                  456         472  
                                                     --------     -------  
     Earnings(B)                                     $  8,979     $73,988  
                                                     ========     =======  
Fixed charges:                                                             
  Total interest                                       27,428      43,674
  Portion of rental expense representative                                 
    of an interest factor                                 456         472
                                                     --------     -------  
     Fixed charges (A)                               $ 27,884     $44,146  
                                                     ========     =======  
Ratio of earnings to fixed charges (B divided by A)       --          1.7
                                                     ========     =======  
Earnings inadequate to cover fixed charges           $ 18,905     $   --   
                                                     ========     =======