<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2007-08-14</periodOfReport>

    <dateOfOriginalSubmission>2007-02-01</dateOfOriginalSubmission>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000895380</issuerCik>
        <issuerName>ALLEGRO BIODIESEL CORP</issuerName>
        <issuerTradingSymbol>DMED</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001344849</rptOwnerCik>
            <rptOwnerName>ASSET MANAGERS INTERNATIONAL LTD.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>88 BAKER STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LONDON</rptOwnerCity>
            <rptOwnerState>X0</rptOwnerState>
            <rptOwnerZipCode>W1U6T0</rptOwnerZipCode>
            <rptOwnerStateDescription>UNITED KINGDOM</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks>On August 14, 2007, the reporting person elected in writing under Section (f)(i) of the Issuer's Designations of the Series A Convertible Preferred Stock (Series A Certificate of Designations) to limit its right to convert shares of Series A Convertible Preferred Stock (Series A Shares) such that the reporting person may at any given time convert only up to that number of Series A shares so that, upon conversion, the aggregate beneficial ownership of the issuer's common stock (calculated pursuant to Rule 13d-3 of the Exchange Act) of the reporting person and all persons affiliated with the reporting person is not more than 9.99% of the issuer's common stock then outstanding.  Upon such election, the reporting person was no longer subject to Section 16.

In connection with the reincorporation of the issuer in the State of Delaware on November 28, 2006, the 7,907,702 shares of Series J Convertible Preferred Stock held by the reporting person were converted into 7,907,702 Series A shares.  On the date of this report, the reporting person held 850,455 shares of common stock and 9,187,977 Series A shares (including an aggregate of 1,280,295 Series A shares received as dividends on December 31, 2006, March 31, 2007, June 20, 2007 and September 30, 2007 pursuant to Section (c) of the Series A Certificate of Designations).</remarks>

    <ownerSignature>
        <signatureName>/s/ William F. Maycock, Director, Asset Managers International Ltd.</signatureName>
        <signatureDate>2007-11-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
